How did Katy Perry celebrate her 29th birthday
 on Friday morning (October 25)? Not by popping bottles and wilding out with friends in Las Vegas (that might come later), but by slipping into a cheerleader outfit and performing a five-song mini-set for some high school students in Colorado. The special appearance at Lakewood High School in Lakewood, Colorado, was seen by 2,700 students and staff and aired live on "Good Morning America." The lucky high schoolers earned the honor over four other finalists after winning a contest for the best lip dub of "Roar." Oh, and, not for nothing, but the school's mascot is a Tiger, so that worked out pretty well.

"I'm 29 and I feel great," Perry told GMA's Sam Champion. "I still feel like I'm 13 sometimes. Obviously you can tell by my music and my spirit ... I just loved all the participation and the unification ... of all you guys coming together and roaring in one shot! That was so cool!"

Their winning, elaborate one-shot contest-winning video began with a student escorting the school's mascot into the gym and then through a gauntlet of the field hockey team, the pep squad, cross country and basketball teams, as well as the debate society, ultimate Frisbee club, volleyball crew and just about every other extracurricular at the school.

Wearing a spangly Tigers cheer outfit, Perry punched, flexed, jump roped and shuffled through "Roar," telling the students, and Colorado Governor John Hickenlooper, "Let me tell you how much I appreciate your ...

One Direction slowed things down on Friday (October 25) when they premiered their new single, off their upcoming album, Midnight Memories.

While they opted for a peppy lead single, to set the tone for their November 25 release, the guys went for a completely different sound for their ballad "Story of My Life," which opens with a folkie guitar arrangement and some heartbreaking lyrics.

"Written in these walls are the stories that I can't explain/ I leave my heart open but it stays right here empty for days/ She told me in the morning she don't feel the same about us in her bones/ It seems to me that when I die, these words will be written on my stone."

The song builds to the chorus, which swells with an almost tribal beat as the guys sing, "The story of my life, I take her home/ I drive all night to keep her warm/ And time is frozen (the story of, the story of)/ The story of my life, I give her hope/ I spend her love until she's broke inside/ The story of my life (the story of, the story of)."

Prior to the release, Niall Horan spoke to radio station Capital FM in the U.K. about the single, which was written with Graffiti6's Jamie Scott.

"He's written a lot with us on this album too. We were in Nottingham on tour when we were touring the U.K. back in February and March, and we just came into a room one day and he was like, ...

Justin Bieber is really giving his fans a behind-the-scenes look at his life in his upcoming concert flick/documentary, In a new sneak peek from the Christmas Day release, some of Bieber's inner crew offer the 19-year-old some sage advice.

The preview features cameos from his dad, Jeremy Bieber, and little siblings, Jazmyn and Jaxon, as well as his mom, Pattie Mallette, who has a typical motherly message for her superstar son. "Justin, I'm so proud of you, and you are turning into an amazing young man," she says, as Bieber's duet with Carly Rae Jepsen, "Beautiful," plays in the background.

Other folks who make appearances in the clip include onetime Bieber swagger coach, Ryan Good, who tells his former mentee, "My advice is just to always just try to be the best person you can be. Stop worrying about being the voice of a generation."

Manager Scooter Braun reveals what he wants most for the teen star. "I just hope he ends up being a happy, kind, content person."

But perhaps it is mentor Usher who has the most grounding advice for the singer, who has faced criticism and growing pains with the entire world watching. "When I first met you, I told you, you can have all of this, if you believe in it," he says in the clip. "And now it's happened. Don't f--- it up."

In a previously released clip from the Jon Chu-directed flick, Bieber opened up about the pressures of fame. "You always gotta keep a smile on your face. Through ...

Katie Holmes is clearly getting very comfortable with her castmates on the set of The actress re-tweeted an image of her "Giver Family" on Friday (October 25), which included co-stars Taylor Swift
 and Jeff Bridges.

In the pic sent out by film producer Nikki Silver and re-tweeted by Holmes, the 34-year-old actress has her arm around Swift on one side and co-star Odeya Rush on the other.

The movie tells the story of a boy named Jonas who grows up in a Utopian community free of war, pain and emotion and whose life changes when he is chosen to store all past experiences as the Receiver of Memory. It is currently shooting in Cape Town, South Africa and is slated for release on August 15. In addition to Bridges and Holmes, it also stars Academy-Award winner Meryl Streep and up-and-coming Australian actor Brenton Thwaites.

Swift was reportedly offered a supporting role in the film by Weinstein Company boss Harvey Weinstein, who introduced her to Thwaites during the Toronto International Film Festival.

Holmes' first-ever official tweet was about the shoot ("loving South Africa!!!"), and it sounds like it's off to a good start. "So happy to be on twitter!!!!!!" she wrote. "Sending first tweets from South Africa!!!!!"

"Maybe we could be each others' soul mates and then we could let men be just these great, nice guys to have fun with."

And that, at its core, was the ethos of HBO's beloved six-season series "Sex and the City." Forget men and Manolos: What would Carrie Bradshaw be without her tight-knit group of girlfriends to lean on and learn from?

In the upcoming season-two premiere of the CW prequel "The Carrie Diaries," our protagonist will begin to assemble that gal-pal gang with the introduction of the city's swingingest single, Samantha Jones, to be played by Lindsey Gort. And though she's a much younger Samantha than the one we've come to know and love, Gort said she's just as saucy as you'd expect.

"She's already as sexually free as one could hope for in Samantha Jones," Gort said. "The biggest difference is that the fashion is different. She doesn't quite have her Manolos yet. She's like most girls in their twenties, just figuring their life out, and you know, she's trying a couple different career moves and bouncing around a little bit. She still has some walls up, a little guarded, but she's definitely a Samantha people will recognize from the Samantha people know."

Speaking of the crazy fashions, Gort explained that it's the absence of apparel that really gets her in the Samantha mindset.

"My craziest outfit would be the lack of an outfit — probably my pasties and underwear combo that I have come to know and love," she said. "I think the first time wearing it was probably my third day. ...

Remixes are nothing new for Linkin Park ... "Reinterpretations" are. So that's what they're calling the songs on the upcoming RECHARGED album, a collection of dramatically re-worked tracks courtesy of Steve Aoki, Pusha T, Rick Rubin and Tom Swoon (to name just a few) that's exclusively streaming right now on MTV.com.

The new album is most definitely LP's most audacious and adventurous to date. Though, as frontman Chester Bennington explained, he and his bandmates see it as less of a reinvention, and more of a logical extension of the territory they've explored on their last two albums, A Thousand Suns and LIVING THINGS.

"I think any of our songs lend themselves well to being remixed; I think it just comes down to being inspired to do it. There were some moments on the last record, where we kind of felt like we had come full circle," he explained. "We've established this identity of being a genre-less band, and so we figured we could take that even a bit further. We decided to let other artists come in and see where their vibe comes from ... and once we started working with artists like Steve Aoki and some of these EDM guys, it felt like a natural progression."

Truth be told, that progression actually began when Linkin Park released LIVING THINGS, as they offered free remixes to fans who bought the album through their official site. After reaching out to a host of artists, they began stockpiling tracks, some of which finally see the light of day on RECHARGED.

"We were ...

November is shaping up to be One Direction month. The fivesome confirmed to MTV News that they will perform at the American Music Awards.

The performance will mark the first time the guys have taken the stage at the big show, which goes live on ABC from Los Angeles' Nokia Theatre on November 24 at 8 p.m. It comes just one day before they will drop their new album, Midnight Memories, on November 25.

Other confirmed performers include Miley Cyrus and country act Florida Georgia Line.

While Macklemore & Ryan Lewis lead the nominees, the 1D guys are up for two awards at the big show. Their nods include Favorite Band, Duo or Group - Pop/Rock (against Macklemore & Ryan Lewis and Imagine Dragons) and Favorite Album - Pop/Rock (for 2012's Take Me Home against Taylor Swift's Red as well as Justin Timberlake's The 20/20 Experience).

The same day the AMAs news was announced, their Directioners were celebrating the anniversary of the release of their second single off their massive 2012 album Take Me Home, Their enthusiasm for the Ed Sheeran-penned slow jam hasn't wavered in the last year.

Need more 1D in your life? One day prior to taking the stage at the AMAs, the band will host a seven-hour live stream in honor of their album release, billed as 1D Day. eTheir next Midnight Memories single, will hit get play this Friday, before its officially release on October 28.