Eva Mendes and Jimmy Fallon's DWTS "Rehearsal Video"

Check out this hilarious DWTS parody from Eva Mendes and Jimmy Fallon.

Josh and Seth Meyers See How Well They Know Each Other on 'Late Night' (VIDEO)

The brothers Meyers were on 'Late Night' (Weeknights, 12:35AM ET on NBC) together, so Jimmy Fallon concocted a game they could play to see how much they really knew about one another. One particular question eluded to a potentially traumatic event in their childhood. At least it seemed that way until we knew the whole story. When the question was posted to Josh Meyers what the Meyers family song might be, he shouted out 'Mommy Come Back.' Fallon almost fell out of his chair in laughter and discomfort. What was happening? Was Josh revealing that their mother had abandoned them?

Daniel Radcliffe Tries His Hand at Stand-Up Comedy on 'Late Night' (VIDEO)

Daniel Radcliffe has been playing Harry Potter for half of his life. Now that the film franchise is finally coming to a close, it's time to start thinking about what's next. He's tried his hand at stage productions and other movies and television work, but 'Late Night' (Weeknights, 12:37AM ET on NBC) afforded him a whole new opportunity. While Radcliffe admitted he's always been impressed with stand-up comedians, he also thinks they have to be insane to get on stage like that. He's never done it, but admitted to doing "loads of horrendous jokes." That was enough to get Jimmy Fallon on board. "You wanna do one tonight?" he asked. "I do it every night. It's fun."

Watch Jennifer Garner Destroy Jimmy Fallon in Beer Pong (VIDEO)

As if she was a complete newbie to the frat house life. Actress Jennifer Garner creamed Late Night with Jimmy Fallon's titular boy scout in beer pong last night—with, she claims, some last-minute tips from her grandmother. That doesn't ring true: Working on the set of the boozy Arthur remake alone will give you bar stool sports championship skills by osmosis.  But, considering Fallon had to chug three Bud Light Limes to Garner's two, he might be the real champ here. I mean, have you tasted that stuff? Just sipping it is a challenge.

Watch Stephen Colbert (and Taylor Hicks!) Sing 'Friday' With Jimmy Fallon (VIDEO)

Last night, Stephen Colbert made good on his promise to cover Rebecca Black's YouTube sensation (some would call it an earworm) 'Friday' on 'Late Night with Jimmy Fallon.' And it was epic. Just a bit of the funny backstory: earlier this week, Colbert claimed that his "best friend for six months," Fallon, was going to match a $26,000 donation to Fallon said he promised no such thing, but in the spirit of saying your BFFSM will do something without consulting him first, he promised that Colbert would sing 'Friday' with the Roots if his audience could raise the $26,000 by Friday. Read More...

Video: Casey, James, Paul, and Stefano Jam to "Band on the Run" by Paul McCartney and the Wings on March 31

Casey Abrams, James Durbin, Paul McDonald, and Stefano Langone debuted their band for the second Top 11 results show. In a shocking turn of events, Paul ended up in the bottom three.

Jimmy Fallon Endorses Casey Abrams on Late Night With Jimmy Fallon

On March 30's episode of Late Night With Jimmy Fallon, Jimmy gave the list of products Casey Abrams can shill for in case he's eliminated. Jimmy is actually kind of terrifying.

Russell Brand To Gayle King on 'Late Night': 'Get Your Frock Off!' (VIDEO)

Gayle King asked for it when she turned and asked Russell Brand's opinion on 'Late Night' (Weeknights, 12:37AM on NBC). They'd just been showing a fun clip from her new talk show on OWN. In the clip, we could see King's leg as she greeted Lady Gaga to the studio. "When Gaga entered the studio I was in my one-piece spanx and my fishnet pantyhose," she said in the clip Jimmy Fallon showed. Lady Gaga complimented King, saying she has a "smoking body." But when King asked Brand how he thought people might respond to her doing that bit, he echoed Gaga's sentiment. "I think they'll tell you you look bloody gorgeous," he said.

Stephen Colbert Tried to Donate Jimmy Fallon's Money Without Asking Him (VIDEO)

Fans of 'The Colbert Report' know that Stephen Colbert recently raised $26,000 for Donors Choose at an art auction. They also know that he announced on his show that his "best friend for six months" Jimmy Fallon of 'Late Night' (Weeknights, 12:37AM on NBC) would be matching that donation. Unfortunately, fans of 'The Colbert Report' knew more than Jimmy Fallon did. Tonight, he shared that clip with his audience and they applauded it. "But here's the thing," Fallon said. "I never said that." At this, Colbert himself came onto the set to set the record straight. "If you can't donate $26,000 of your best friend's money without asking him first, then what's the point of being best friends?" he asked.

Brian Williams Notices Jimmy Fallon Has 'A Little Political 'Tude Coming Out' (VIDEO)

Jimmy Fallon has a lot on his mind these days, and he decided to unload a bit of it on guest Brian Williams on 'Late Night' (Weeknights, 12:35AM ET on NBC). After all, the 'NBC Nightly News' anchor is well-versed in politics and the happenings of the world. It is kind of his job. So Jimmy decided to talk about the political climate right now. "It feels like President Obama is playing soccer in Rio with kids and Hillary Clinton seems to be weirdly stepping up, almost like she's being very presidential," he said. He couldn't understand why Obama was in South America with everything that's been going on the past week or so.