Billie Eilish talks about the meaning behind "What Was I Made For?," what it was like working with Greta Gerwig and her appearance on Saturday Night Live.
The Tonight Show Starring Jimmy Fallon features hilarious highlights from the show, including comedy sketches, music parodies, celebrity interviews, ridiculous games, and, of course, Jimmy's Thank You Notes and hashtags! You'll also find behind the scenes videos and other great web exclusives.