Walking out onto the set of Late Night with Jimmy Fallon to the tune of the theme song from Diff'rent Strokes, actor Fred Willard last night made his first public appearance since being arrested for lewd conduct inside an adult movie theater in Hollywood.

One upon a time (2002), in a land called VH1, a then-beardless Zach Galifianakis had his own late-night talk show called Late World with Zach that was canceled after nine weeks.

From last night's Late Night with Jimmy Fallon, a straightforward gag with straightforwardly funny results: Either Paul Reubens or Jimmy Fallon as Paul Reubens doing signature Pee-wee Herman voices over the trailer for Christopher Nolan's The Dark Knight Rises.

In case you missed it: Late Night with Jimmy Fallon host Jimmy Fallon and Magic Mike's Channing Tatum star as best besties Sara and Susie in Teen Nick's new teen talk show for teen girls, Ew!

On tonight's Late Night, Lena Dunham revealed that she once wrote a play wherein she switched bodies with Jimmy Fallon and then they fell in love, which means that she falls in love with her own image like a mumblecore Narcissus. An additional takeaway: she was at a party with Fallon when she was 17 which in no way has to do with having rich, prominent, well connected parents at all.

Sorry, everyone, but you'll never escape this song this summer, so you might as well force yourself to watch every single goddamn daily cover released of Carly Rae Jepsen's "Call Me Maybe," because at least it changes things up a bit.

On Tuesday night, President Obama appeared on Late Night with Jimmy Fallon to slow jam the news and, according to Fox News, pander to the youth vote that he desperately needs to win another term. On tonight's Colbert Report, Stephen Colbert took a close look at Fox News' reaction to President Obama's appearance which, naturally, they weren't too wild about.

President Obama's much hyped appearance on Late Night with Jimmy Fallon got off to a great start when the two, with help from the Roots, slow jammed the news. Pure gold.

Lindsay Lohan is hosting Saturday Night Live this week and stopped by Jimmy Fallon's show to make sure everyone knows about it. Before reminiscing about the classic Debbie Downer sketch that they all giggled through during her first hosting appearance, Lohan talked about how she ended up doing the show this time around. Turns out, she hounded Lorne Michaels until he said yes.

NBC suits have restricted The Roots drummer Questlove's freedom to pick songs for Late Night with Jimmy Fallon after he selected "Lyin' Ass Bitch" to introduce Michele Bachmann. He must now "clear every song with three different NBC execs."

Even though New York First Mistress Sandra Lee is forever partial to Halloween—if you don't know why, do yourself a favor and click here to find out—she still made time to visit tonight's Late Night and prepare a Thanksgiving meal with Jimmy Fallon. And by "Thanksgiving meal," I mean "a gross-looking Bailey's martini and some cornbread stuffing with a can of Campbell's chicken rice soup in it," among other monstrosities. Aunt Sandy, God love her.

As the house band for dancing spider monkey Jimmy Fallon, The Roots are sometimes forced to express themselves via the intro music that they choose to play when various celebrities walk out onto Fallon's stage.

Brian Williams occasionally stops off at Late Night to slow jam the news with Jimmy Fallon. Since Rock Center, Williams' new primetime show, debuts on Monday and he wouldn't want anyone out there to forget to tune in, God forbid, he paid a visit to Fallon tonight to add some suave sexiness to the Occupy Wall Street movement. Watch them make the musical magic happen—and struggle to remember the name of Kim Kardashian's husband—above.

Samuel L. Jackson registered a Twitter account more than two years ago, but never bothered to send out a single tweet. Then today, followers of @SamuelLJackson were greeted with a tweet that read, "Can-a muh fukkasay fuck on here?" Anyone wondering why Jackson decided to start tweeting today got their answer on tonight's Late Night: It was all thanks to Jimmy Fallon.

Conan O'Brien returned to NBC, and the studio he occupied for 16 years as host of Late Night, on Wednesday when he paid Jimmy Fallon an on-air visit. But as you'll see in this clip, O'Brien wasn't there for nostalgia's sake. He'd come to take back Triumph the Insult Comic Dog, even though his settlement with NBC prevents him from using the character anywhere else.

On tonight's Report, Stephen Colbert's BFF for six months, Jimmy Fallon, stopped by to bask with him in the glory of their unlikely bond. But then they realized that their friendship was actually supposed to end 12 days ago, so the two men made haste to hate. Luckily for Colbert, at least, a new prospective BFF was already waiting in the wings, ready to take Fallon's place.

Emma Stone has had three movies come out in as many weeks, so naturally she's been on just about every talk show imaginable recently. You'd think she's run out of interesting anecdotes by now, but Stone's interview with Jimmy Fallon on tonight's Late Night was actually kind of adorable. Watch Stone discuss her paranoid fear of Twitter and the FarmVille addiction that forced her to delete her Facebook account in the clip above.

Snooki graced Jimmy Fallon with her busty orange glow on tonight's Late Night. At the end of the interview, Fallon asked the Jersey Shore star about The Situation's claims during last week's show that he had a sexual relationship with her and she pretended to vomit. "He took my friendship as a wrong way, you know? Yeah, he got a little too creepy."

Late Night can-do kid Jimmy Fallon has found success on television, and with that comes lots of money. Lots of money to buy vacation houses! Vacation houses like this $5.7 million Sagaponack home/apple orchard that he is said to be closing on.

Sean Parker's cocaine arrest is no secret. But the former Facebook president—who was played by Justin Timberlake in The Social Network—once had a wide range of addictions, he told Jimmy Fallon at a technology conference.