This is too adorable to believe. Idina Menzel sang "Let It Go" on The Tonight Show with Jimmy Fallon, backed up by…
Now playing
Jimmy Fallon has been killing it on The Tonight Show and I hope he refuses to run out of steam.
When NBC announced last May that their next late night host would be Seth Meyers, reaction ranged from Yay, I love…
Now playing
On Thursday's Tonight Show, Will Ferrell came out dressed in a spandex tuxedo, top hat and white gloves. That…
Now playing
First Lady Michelle Obama joined Jimmy Fallon and Will Ferrell on The Tonight Show on Thursday, for a sketch called…
Now playing
On Wednesday night's Tonight Show hosted by Jimmy Fallon, the comedian joined country singer Tim McGraw in a…
Now playing
This perfectly edited footage of NBC Nightly News anchor Brian Williams rapping the classic "Rapper's Delight" comes…
Now playing
The Tonight Show and Jimmy Fallon brought back their epic #hashtag skit, this time with Jonah Hill filling in for…
Now playing
On Tuesday night's episode of The Tonight Show with Jimmy Fallon, Kristin Wiig Harry Styles stopped by.…
Now playing
Until last night, onetime Tonight Show regular Joan Rivers hadn't been welcomed onto the set in nearly 30 years. But…
Now playing
On his debut as host of The Tonight Show, Jimmy Fallon did a lot of hilarious, memorable things. But the best one…
Before he makes his debut as the new host of The Tonight Show, check out one of the biggest reasons we loved Jimmy…
Now playing
In honor of Jimmy Fallon's final week on Late Night, Olympic gold medalist Tara Lipinski performed a very special…
Now playing
Melissa McCarthy is returning once more to host SNL this weekend, and in advance she stopped by Late Night with…
Now playing
Full House's Danny (Bob Saget), Jesse (John Stamos) and Joey (that SEX PERVERT David Coulier) aren't just coming…
Now playing
Jimmy Fallon didn't invent the game Hot Dog in a Hole as a reference to Bachelor Juan Pablo's recent homophobic…
Now playing
Last night on Late Night, Jimmy Fallon came out dressed as New Jersey-born rock legend Bruce Springsteen to perform…
It's always refreshing to see famous people get humbled by their own success, and this message from Jimmy Fallon…
Now playing
Being a grown-ass adult and having hushed, fumbling sex in your childhood bedroom (or what's left of it after your…
Now playing
Jimmy and Justin are both making big returns to Saturday Night Live this week, in what looks to be kind of a…