Jimmy Fallon

Fallon and Joel become a two-man doo-wop band in this classic Tonight Show clip.

"She's actually really annoyingly cool. It's a problem," joked the Fly Me to the Moon star.

"You're a sick, evil man," Fallon told Hot Ones Host Sean Evans when he and Gomez sat at the tasting table.

Jimmy Fallon has got a pocket full of 'H's that he's not afraid to use in this throwback Electric Company clip. 

Her cover of the SpongeBob SquarePants theme song has to be seen to be believed.

Jimmy Fallon and his wife Nancy each told their version of the milestone moment — except their memories didn't fully match up.

Fallon and the Happy's Place star performed an impromptu duet...mere inches from an audience member's face.

Jimmy Fallon dusted off his Joe Biden impression for a faux phone call with "Barack Obama" following the June 27 presidential debate.

"You know what I respect about you? You knew when to give up making movies entirely," Reynolds told Fallon.

Murray, Naomi Osaka, and more tennis stars injected some silliness into their U.S. Open sound bites, with help from The Tonight Show.