We still may not know what's in that gold truck driving across the country, but we do know that Katy Perry's new single is called — "Roar."

It had been rumored earlier this week that Perry's lead Prism single would be titled just that... and the singer confirmed it Friday (August 2), sharing it will debut on August 12.

In the dark announcement clip, Perry wears a choker, striped sweater and dark lipstick, a pulsing hum serving as the soundtrack. She then takes a lighter and holds it up to her signature blue wig, worn during her . As the wig burns up, the camera pans out to reveal Perry in full-on badass mode. The words appear onscreen in tiger print.

Perry had one additional message for her Katy Cats, tweeting, "WE DON'T NEED NO WATER LET THE BABY BLUE BURN."

Little else is known about the song, but it's rumored that Dr. Luke, Max Martin and Bonnie McKee have a hand in its creation. In fact, McKee may have inadvertently given MTV News a vital clue about the track last month.

"I think it's a little bit more grown up and it's really interesting," said McKee, who had worked with Katy on "California Gurls." "I'm really excited for the world to hear it because she's just... 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."

"Roar" drops one week before Lady Gaga will release her new single ...

Lady Gaga has worn many, many, many looks over the course of her eye-popping career, but her newest makeover, in the new trailer, might be her most unexpected to date.

In the latest trailer, which premiered Friday (August 20), a gun-toting Cuba Gooding Jr. appears on the screen, saying, "You've seen my face."

Gooding Jr. then peels off the synthetic face to reveal Gaga lurking underneath the surface, wearing a strapless red outfit, complete with bright-yellow blond hair, looking a bit like her killer .

"Muy bien, indeed," says Gaga, who will play Lady Chameleon in the flick. The camera then closes in on Gaga's face as she offers up sultry gaze.

The film, from director Robert Rodriguez, also features a who's who of actors including Danny Trejo in the title role, as well as Carlos Estevez (better known as Charlie Sheen) playing the president of the United States. The film boasts appearances from Vanessa Hudgens, Sofia Vergara, Mel Gibson, Antonio Banderas, Jessica Alba, Amber Heard and Michelle Rodriguez.

"Machete Kills," the sequel to 2010's "Machete," opens in theaters on September 13, and marks Gaga's big debut on the big screen. And three weeks before she premieres the flick, she'll take the stage at the 2013 MTV Video Music Awards, where she will perform her new single, "Applause," off her November 11 album release, ARTPOP.

Gaga will release the song and video for , giving her Little Monsters just enough time to learn all the words before she performs it live at the Barclays Center in Brooklyn at ...

Nothing is what it seems in Icelandic director Baltasar Kormákur's gritty "2 Guns," a film that puts undercover agents played by Denzel Washington and Mark Wahlberg against each other before letting them loose on those who did them wrong. Based on the Boom! Studios limited series of the same name by Steven Grant and Mateus Santolouco, "2 Guns" seems primed to give moviegoers a late-summer palette cleanser following a season full of big-budget bombs.

While critics seem divided on whether or not "2 Guns" manages to be anything more than a throwback to '70s conspiracy-laden crime films, most critics can agree that Washington and Wahlberg bring an A-game befitting A-list stars. The supporting cast — consisting of Bill Paxton, Paula Patton, James Marsden, and Edward James Olmos — receives just as much praise as the film's two big guns, with each actor reveling in every old school double cross and standoff.

Read on for a sample of "2 Guns'" reviews.

Scene-Stealing Support
"[Mark Wahlberg and Denzel Washington are] two of the most reliable, relatable action heroes in American movies today. In '2 Guns' the company they keep on screen is solid, thanks to Bill Paxton as a vicious CIA operative after the millions stolen from a New Mexico bank; Edward James Olmos as a drug lord, after the same; James Marsden, as a U.S. Naval Intelligence officer, after the same." — Michael Phillips, Chicago Tribune

Mark Wahlberg And Denzel Washington
"Denzel Washington and Mark Wahlberg are great company. You'd want to have a beer with them, trade war stories and laugh your ass off. But ...

As buoyant and blithe as it is, Robin Thicke's ubiquitous "Blurred Lines" video is undoubtedly, unequivocally not for children's eyes. But Jimmy Fallon apparently thinks everyone should hear Thicke's cheery gospel — even the little ones.

That's why Fallon recruited Thicke and the Roots to put a mom-approved spin on the chart-topping song — free of topless models or R-rated lyrics. The group — fully clothed in all black — ditches the back-up music and picks up classroom instruments to create a "Blurred Lines" with far less blurry intentions. (We'd like to see what director Diane Martel would think of it.)

Packed tight in a recording studio, Fallon's helps keep the beat on a woodblock, ?uestlove's got a shaker of some sort, and Thicke has ... a spoon. One member of the ensemble pounds a rainbow xylophone, while another strums a ukulele. And then there's the guy with the banana. It was unconfirmed at press time what the banana's purpose was.

But what about the lyrics, you ask? Worry not, the Roots offer up their own G-rated take on T.I.'s sex-laden verse, dedicated to "my own Miss America." "The best girlfriend I ever had is you ... So I put a ring on it and I married you," one member sings into a rasta-colored maraca.

In essence, it was three minutes of kid-friendly perfection. That is, unless you have a particularly precocious 8-year-old who can un-blur the suggestive words of the chorus. And if that's the case, good luck.

Despite its title, Drake's latest single, is still a family affair with verses from both 2 Chainz and Big Sean. But turns out both Sean and Drake had recorded over the beat after falling in love with it — they just didn't know it.

"[Drake] records a lot at his house in L.A., and I was recording in L.A. for Hall of Fame, so we'll kick it and exchange music," Sean told MTV News of how the track came together. "Key Wane had that beat, and it was funny because I wanted to use it for Hall of Fame and [Drake] wanted to use the beat too."

"I had done a verse to [Key's beat] and didn't know [Drake] did a song to it," the Detroit rapper explained. He went on to add that it was Key Wane who encouraged him to send his verse since Drake really wanted to lock it down for Nothing Was the Same.

"I sent him the verse and [Drake's] like, 'You bodied this sh--.' Then we had the song forever," Sean said. "He was like, 'I already did my verse and 2 Chainz did his verse but we've gotta get the right chorus,' and that took a while. But everything happened at the right time."

Released late Wednesday, "All Me" finds all three rappers skipping the humble-brags to spit it right out, with Drake even crowning himself the "light-skinned Keith Sweat." Sean gets right into it, kicking off his verse with the same explosive, expletive-filled intro he gave us on "Switch Up."

"I ...

The newest Hollywood "it" couple everyone will be talking about? Oscar and Ellen.

Academy Awards producers Craig Zadan and Neil Meron announced Friday that comedian Ellen DeGeneres will host the 2014 Oscars.

"We are thrilled to have Ellen DeGeneres host the Oscars," Zadan and Meron said in a statement. "As a longtime friend, we had always hoped to find a project for us to do together and nothing could be more exciting than teaming up to do the Oscars. There are few stars today who have Ellen's gift for comedy, with her great warmth and humanity. She is beloved everywhere and we expect that the audience at the Dolby Theatre, and in homes around the globe, will be as excited by this news as we are."

This will be DeGeneres' second time emceeing the film industry's biggest night. She wielded the mic back in 2007, earning an Emmy nomination for Outstanding Individual Performance in a Variety or Music Program.

"I am so excited to be hosting the Oscars for the second time. You know what they say — the third time's the charm," the talk show host joked in a statement.

It had been earlier speculated that last year's host, "Family Guy" creator Seth MacFarlane, would return for a repeat performance, despite raising eyebrows (and plenty of ire) with his controversial jokes. But MacFarlane set the record straight back in March, tweeting: "Traumatized critics exhale: I'm unable to do the Oscars again. Tried to make it work schedule-wise, but I need sleep..."

The Oscars will air Sunday, March 2, 2014, on ABC.

Simon Cowell didn't hold back on Thursday when asked how he felt about the second season of the "X Factor," which featured (now-departed) newcomer Britney Spears in the mentor's seat.

While Cowell didn't name names, he did speak his mind with comments that could be interpreted to be about Spears, considering the pop star left the singing show after just one season and weak reviews.

"It's like having a dinner party. You invite people for dinner and sometimes it's a fun night, and other times it's not as fun as you hoped it would be," Cowell said at the Television Critics Association panel.

"This [season] is a fun dinner party," he continued before adding that he knew the season-two panel — made up of Spears, Cowell, Demi Lovato and L.A. Reid — wasn't gelling from "day one." "I felt we were doing what everybody else was doing and I had this impatience to get on to [upcoming] season three so we could do what we wanted to do," he explained.

Both Spears and L.A. Reid left the show at the end of season two, paving the way for Paulina Rubio and Kelly Rowland to join Cowell and returning mentor Lovato on the panel. Cowell said the new group feels "like family." "You have to be competitive, and you have to make changes," he said. "I work hard. It makes it fun. I'd love to be number one."

Season three will be split up into boys, girls, over-25s and groups; the prize has been shaved down from $5 million to ...