Happy Birthday, Pitbull! Here Are Some Of Your Most Defining Pitbull Moments In Gifs

All of Pitbull's greatest moments - in GIFs.

Taylor Swift And Kendall Jenner Deck The Walls Of Gigi Hadid's Apartment For Christmas

Taylor Swift and Kendall Jenner team up to decorate friend Gigi Hadid's apartment for the holidays.

Meet The Comedian Who Tweeted The Perfect Analogy For Catcalling

He really gets it.

Jessie Ware's Ultra Romantic Photo Booth Video Features A Celebrity Cameo You Shouldn't Miss

Jessie Ware sneaks in one of her musician friends in her 'You & I (Forever)' video.

Watch Meghan Trainor Nail Bruno Mars' 'Uptown Funk' Dance Moves

Meghan Trainor takes on the dance moves in Bruno Mars and Mark Ronson's 'Uptown Funk' music video.

Lorde And Diplo Are Cool Now, For Real

Lorde and Diplo squash their beef.

What Else Did Hilary Duff Do In NYC Besides Get Carded?

Hilary Duff gets carded and enjoys an eventful Sunday in NYC.

Selena Gomez Rocks Out While Lip Synching Carrie Underwood: Watch

Carrie Underwood wants to do her own rendition of Selena Gomez's latest song.

Harry Styles Reveals His Favorite Song Off FOUR

Harry Styles answers Directioners' burning questions about 'FOUR.'

Lorde's 'Yellow Flicker Beat' Video Is Darker Than Ever

Lorde drops the music video for "Yellow Flicker Beat," the first song from the "Hunger Games: Mockingjay - Part 1 " soundtrack.

Need To Know: Kelly Rowland Gives Birth To First Child

Kelly Rowland gives birth to first child, Taylor Swift's album goes platinum and everything that you #NeedToKnow.

Need To Know: Benedict Cumberbatch Designs A Paddington Bear For Charity

Benedict Cumberbatch designs a Paddington Bear, Ed Sheeran accepts an engagement ring and everything that you #NeedToKnow.

Need To Know: Deadmau5 Says He Would DJ With Paris Hilton For This Much Money

Deadmau5 says he would deejay with Paris Hilton, our latest Artist to Watch and everything that you #NeedToKnow.

Need To Know: Usher Reunites With Justin Bieber At Cleveland Cavaliers Home Opener

Usher reunited with Justin Bieber, the new 'Harry Potter' story was released and everything that you #NeedToKnow today.

Need To Know: Sia Breathes 'Gorgeously And Magnificently' Into Jar For Film Festival Auction

Sia's breath is being auctioned off, Suge Knight arrested and everything that you #NeedToKnow.

Need To Know: Watch Sesame Street's Take On Harry Potter's 'Goblet Of Fire'

Watch Sesame Street's take on 'Harry Potter,' Marvel reveals names and release dates of its Phase 3 films and everything that you #NeedToKnow.

Need To Know: Who Did Katy Perry Celebrate Her Birthday With?

Katy Perry celebrates her birthday with some familiar faces, Marvel finds its 'Doctor Strange' and everything that you #NeedToKnow.

Need To Know: Iggy Azalea's 'Beg For It' Collaborator Explains Time Delay During 'SNL' Performance

Iggy Azalea's collaborator explains time delay during 'SNL' performance, new 'Fast And Furious' poster with Paul Walker and everything that you #NeedToKnow.

The Never-Before-Told True Story Of Being A Seventh Wheel

Being the third wheel is nothing compared this...

Need To Know: Sam Smith Announces His Next Single

Sam Smith's newest single, MTV Homecoming last round and everything that you #NeedToKnow.

Need To Know: Charli XCX And Bella Thorne Crash A Homecoming Dance

Charli XCX and Bella Thorne crash a high school homecoming dance, new 'Avengers' trailer debuts and everything that you #NeedToKnow today.

Sam Smith And Ed Sheeran Are Majorly Fanboying Over This Artist's New Album

Sam Smith and Ed Sheeran bought how many copies of Jessie Ware's 'Tough Love' album?

Need To Know: 5SOS' Ashton Recovers And Gives A Tour Of His Bandmate's House

5 Seconds of Summer's Ashton gives a tour of bandmate's house, 'Breaking Bad' dolls removed from Toys 'R' Us and everything that you #NeedToKnow.

5SOS' Calum Hood Is Now 'Scared Of Females' After Watching This Movie

5 Seconds of Summer's Calum Hood reveals that he's scared of women after watching the blockbuster thriller "Gone Girl."