ANAHEIM, California — The festivities at Disney's D23 fan convention kicked off with a look at the studio's upcoming slate of animated movies, specifically a preview of what Pixar has coming up for the next three years.

Disney Animation head John Lasseter presented previews of 2014's "The Good Dinosaur," 2015's "Inside Out" and 2016's "Finding Dori," with help from a few special guests and many appearances from Bill Hader.

"The Good Dinosaur"
As Lasseter explained, many of Pixar's movies have begun conceptually as "what if" questions, like "What if your toys came to life when you left the room?" for "Toy Story." The genesis of "The Good Dinosaur" began similarly, with the question "What if that asteroid missed the Earth and the dinosaurs survived?" Pixar's answer to that question is that they adapted as farmers, and each type of dino has a specific task out in the field. Arlo, the Apatosaurus hero of "The Good Dinosaur," leads a separate story line that has him finding a small human named Spot.

The footage screened at D23 had the typical Pixar flair for stunning visuals and included looks at the farming processes of the various dinosaurs and how this alternate world works.

At the end of the presentation, the director and producer announced that the cast includes Bill Hader, Neil Patrick Harris, Judy Greer, John Lithgow, Frances McDormand and Lucas Neff (as Arlo).

"Inside Out"
"Up" director Pete Docter then took the stage to introduce his upcoming project, "Inside Out," or as it was called at last year's D23, "The Untitled Pixar Movie That Takes You Inside the Mind." ...

Katy Perry burned her blue wig, laid her "California Gurl" to rest and turned an adorable kitten into a ferocious animal. On Friday (August 9), she continued to put the past behind her.

In the latest teaser for her upcoming single, "Roar" — the first off her October 22 album Prism — Perry gives fans a longer snippet of the uptempo, power-pop track, which is set to premiere on Monday.

In the clip, titled the "Wide Awake" singer seductively, yet mischievously gazes at the camera as she walks into a recording studio. Perry then gets behind the microphone, puts headphones on and takes one long look at the camera before it cuts to the song title and the track fills our ears. "I am a champion, you're gonna hear me roar," Perry declares.

It's worth noting that Perry is rocking a considerably darker new look in the recent clips, including a cut-off striped sweater, skirt and choker. In the new 45-second tease, fans get to see the entire outfit, which finishes off with thigh-high stockings, combat boots and the same jean jacket she sports in her Lisa Frank-inspired single cover art.

Perry reportedly worked with producers Dr. Luke and Max Martin and longtime collaborator/songwriter Bonnie McKee on "Roar." And McKee recently told MTV News she is "really excited for the world to hear it because she's ... taking a new approach.

"And I don't want to say too much about it, but it's definitely different. It's definitely a little more mature than the 'California Gurls' of yesterday."

Fans ...

For the past year, we have watched Miley Cyrus go from Disney darling to a twerk-loving pop diva.

She shocked many with her questionable lyrics (is it ) and video for "We Can't Stop," but Cyrus is just getting started, and on her fourth album, she's doing things her way.

"You know, there's definitely been times where I've had to fight for what I want on this record," Cyrus told MTV News on the set of her VMA promo shoot. "But I think everyone now is starting to see that I had a vision, and I'm really excited about it. It's just gonna be — it's gonna be crazy. It's gonna be single after single after single."

Which is why Cyrus, who is nominated for three MTV Video Music Awards, appropriately titled the album BANGERZ. "If you don't know why my record is called BANGERZ you'll know as soon as you hear it. Nothin but #BANGERZ," Cyrus tweeted shortly after revealing the album title when she reached 13 million followers on Twitter.

And with the roster of A-list artists — including Wiz Khalifa — she has lined up for the album, it may be hard to disagree.

"I have a lot of features on my record," Cyrus said. "But some of my favorite ... I get to work with Future, who's like my favorite kind of new artist right now, even though he's not that new now. All his music is everywhere. But he's just someone that I really, I love working with. I love writing with ...

An ambulance was reportedly called to a Hollywood recording studio early Friday morning (August 9) after 911 dispatchers received a call that Chris Brown had suffered a seizure.

According to TMZ, the Los Angeles City Fire Department rushed to the Record Plant recording studio in Hollywood shortly after 1 a.m. in response to the call. But when they arrived, Brown reportedly refused to be treated or to be transported to the hospital.

The site cited unnamed sources that claimed Brown suffered from seizures as a child. A spokesperson for Brown could not be reached for comment at press time about the incident or the singer's alleged seizure history. A spokesperson for the L.A. City Fire Department was also not available for comment at press time and MTV News was unable to reach a source at the Record Plant for confirmation on the incident.

Brown's on-and-off girlfriend, Karrueche Tran, tweeted, "Prayers all day." She later added, "A lot on my mind today ... I need a hug," along with a pensive-looking selfie.

The health crisis for Brown comes in a year when a number of stars have been felled by seizures. Four months ago Lil Wayne told MTV News that he doesn't remember the series of seizures
 that landed him in a hospital earlier this year; the rapper has acknowledged that he suffers from epilepsy Last April, Rick Ross' friend DJ Khaled dismissed rumors
 that the Bawse suffered another seizure, just months after he had a pair of seizure-related health scares
.

Brown has been active on ...

Matt Damon is headed to the utopian space station known as this weekend, and Sony Pictures is hoping he will knock a few "Planes" out of the sky on his way into the box-office stratosphere.

The sci-fi class warfare tale "Elysium" will face its strongest competition from Disney's "Planes" as they enter theaters alongside the comedy "We're the Millers" and a second installment in the adaptation of the "Percy Jackson" series.

"Elysium" is filmmaker Neill Blomkamp's follow-up to his acclaimed "District 9." The dystopian story, set in a future where the rich live in luxury aboard a space station while the working class toil in squalor below, marks Damon's first foray into full-on, live-action science fiction. Damon expressed his fondness for the genre in a recent MTV News interview, in which he cited "Aliens," "Blade Runner" and as favorites (and said nice things about JJ Abrams).

The year's other big-budget, non-sequel sci-fi stories — Tom Cruise's "Oblivion," director Guillermo del Toro's "Pacific Rim" and Will Smith's box-office bomb "After Earth" — preceded Damon's R-rated picture. All things considered, industry watchers have predicted an opening weekend in the low to mid-$30 million range. That would put the $115 million fantasy at #1, though a few million shy of the debuts of "Oblivion," "Pacific Rim" and 2009's "District 9."

The #2 position should belong to Disney's "Cars" spin-off which features comedian Dane Cook in the lead voice role. While technically not a Pixar film, Disney Toon Studios' "Planes" does boast Pixar boss John Lasseter as executive producer. Nevertheless, critics ...

Fat Joe isn't the same guy who dropped his debut album Represent 20 years ago. Back then, he went by Fat Joe Da Gangsta. He has since weight and some aggression — as evidenced by his Casanova-like singles "Another Round," "Pride N Joy" and most recent one

That doesn't mean Joey Crack has forgotten his roots though. His upcoming The Darkside 3 mixtape will drop on August 26, and it will feature production from an old friend. "I got beats from Diamond D — we just through it on, we just rocked," Joe revealed to MTV News.

For those unfamiliar, Diamond was a very popular rapper and producer in the early 1990s. He helped pave the way for artists like Kanye West and Pharrell Williams to be able to rock both the mic and the boards. Diamond also gave Fat Joe his start by adopting him into his Diggin' In the Crates crew. It's been a number of years since they worked together.

"When you go to Fat Joe Da Gangsta, I got Darkside 3 dropping at the end of this month and it's just straight boom-bap hip-hop. I don't even know how to explain it to you," he said. "I think some songs don't even got hooks."

On August 26, Fat Joe has to turn himself in on federal tax charges; he plans to drop The Darkside 3 on the same date. "I tried to avoid it, I tried to do the right thing, I tried to pay it back, but it is what it is," he said of ...

Earlier this week, Jared Leto bemoaned his lack of a summer vacation, a fact due in no small part to his job as director on Thirty Seconds To Mars' "Do or Die" music video.

But, as it turns out, he can't put all the blame on that clip. After all, as is often the case with him, Leto was actually pulling double duty during the filming of "Do or Die," shooting a second Mars music video ... this one for the track "City of Angels." And, from the sound of things, this one's gonna be epic.

"I'm making two videos at once. I've been working on 'City of Angels' while I was shooting 'Do Or Die,'" he said. "It's our new single here in the states, it's a very important song, a very personal song, and I think a very personal song.

"It's also a longer song, and while I'm still figuring out what [the video] needs, it will certainly feature a couple of pieces of music, minimum," he continued. "So, yes, it's going to be another Thirty Seconds To Mars short film; it's going to be powerful and emotional and definitely something special."

And for a guy whose past credits include shooting a mini-movie for in China, pushing boundaries with the hyper-sexualized and employing an army of extras and animals for that's saying something.

What Leto wouldn't say was just when "City of Angels" would be finished — "sooner rather than later," was about as specific as he'd get — but he did let MTV News ...

We learned this year that not all rappers are able to offer up adequate apologies when their lyrics come under serious fire. And while some argue that they shouldn't be apologizing in the first place, Drake disagrees, telling MTV News that "sometimes it doesn't pay to be that rebellious."

Last month, J. Cole was criticized for his unkind reference to autism on Drake's prompting both rappers to apologize for the lyrics. In this situation, the YMCMB rapper says that they both felt the need to take responsibility.

"I think we're just both genuinely good guys. I don't want anybody to be offended, and Cole is the nicest guy in the world, so I'm sure it was the worst day ever for him, as far as being attacked by people," Drake told MTV News.

"It's a shame that he got attacked like that because he's such a great guy and that's why I chose to step in and say sorry as well because I felt like — I'm not gonna let him sink by himself, like, 'Oh that wasn't me,' " he added. "It was my song and at the end of the day, I think everybody knows me and Cole are both young guys that stand for something positive."

"It was just important to reinforce that. A lot of people see it as a cop-out — 'oh, you're apologizing' — but sometimes it doesn't pay to be that rebellious. If an apology is what it takes, then [fine]."

At the same time, Drake understands the concerns of those who feel that ...

Is Ariana Grande getting intimate with Justin Bieber?

Last night, before a Believe Tour stop in Tampa, Florida, Grande posted a snap on Twitter of the tourmates getting cuddly. Bieber gives singer a kiss on the cheek while she looks innocently into the camera with her signature smirk.

"@justinbieber you're crazy and nonna says thank you, she loves you," Ariana wrote on Thursday, with a flurry of tweets from fans swirling around her photo in the hours that followed.

She quickly responded to relationship rumors: "Everyone, girls are allowed to be friends with guys. I'm a lady. Chill out."

Ariana is currently on tour with Bieber, with one date left to go on August 10. After that, she's going on her own trek for the Listening Sessions for the rest of the month.

Justin had met Grande's grandparents, and he asked her to post the photo of them, writing, "@ArianaGrande post that pic and tell your grandma she is a cutie."

Fans still might be a little confused why Grande's grandma has a thing for Biebs, but the snuggly photo that followed caused even more jaws to drop. But actually, fans were really into the pairing.

"PLEASE TELL ME THIS ISNT THE CUTEST PICTURE EVER ❤," wrote one excited fan.

But mostly, fan reaction was just one large bowl of alphabet soup. Fans had a hard time forming words after seeing the photo, writing a bunch of jumbled letters. In ALL CAPS, of course.

What do you think of the photo? Tweet @MTVNews with your reaction!