Top Videos: Ricky Gervais Plays Word Sneak, a 9-Year-Old's Unbelievable AGT Audition

This week, Ricky Gervais couldn't keep a straight face while playing "Word Sneak" withJimmy Fallon on The Tonight Show, and hilarious husband-and-wife team Nick Offerman and Megan Mullally talked about their new show "Summer of 69 — No Apostrophe" on Late Night with Seth Meyers. Nine-year-old piano prodigy Adrian Romoff blew the judges away on America's Got Talent, and Netflix mashed up Orange Is the New Black with Arrested Development. Finally, a cat and a horse brought their amazing friendship to the Internet. Check out those clips and more in our weekly roundup of the best online videos:

Photos: The most charisma-free actors

OITNB gets Arrested: The Season 2 premiere of Orange Is the New Black is only a day away! To tease the new episodes, Netflix released this cross-promotional video, in which the opening credits of OITNB are treated to very Bluth-y makeover.

Word Sneak with Ricky Gervais: A skeptical Ricky Gervais agrees to take part in Jimmy Fallon's prank game "Word Sneak," in which the goal is to seamlessly work random words into sentences.

TV's Greatest Catchphrases: Take a trip down memory lane with this supercut of TV's greatest catchphrases. You got it, dude!

Adrian Romoff's America's Got Talent audition: Get ready to have your mind blown by 9-year-old piano prodigy Adrian Romoff, whose audition for America's Got Talent aired Tuesday. He makes for a pretty astounding interview, too.

YouTube's birthday musical mashup: In honor of its ninth birthday last month, YouTube compiled a video featuring some of the site's biggest stars performing karaoke versions of YouTube's greatest hits. Spoiler alert: Some of them probably shouldn't quit their day jobs. (via Tubefilter)

Cat on a horse: Are Champy and Morris the new Milo and Otis? Champy the horse and Morris the cat spend all their days together on a farm in New South Wales, Australia, with Morris casually riding around the grounds on Champy's back. Check out the adorable video below:

Nick Offerman and Megan Mullally: Everyone's favorite comedic couple, Nick Offerman and Megan Mullally, sat down for their first-ever joint interview this week. In this clip from their chat with Seth Meyers on Late Night, Mullally raps (!) and Offerman repeats the phrase "penis action."