Watch Liam Payne Perform 'Strip That Down' on 'The Tonight Show'The performance featured backup dancers in a big neon frame and Payne gave a shoutout to the talk show host.
Watch Lil Yachty Rap about 'The Simpsons'"You’ve got Homer, Marge, Lisa and Bart/ You got Maggie and Santa’s Little Helper to start."
Watch Niall Horan Try to Write a Song About 'Quickly Clicky Pens'Horan and Jimmy Fallon have fun in the segment 'Instant Song Challenge.'
We Can't Even: Timberlake and Fallon go "Bro Biking" in HamptonsYes, that's Justin and Jimmy on a tandem bike....
Watch Harry Styles and Jimmy Fallon's Snappy New SNL PromoThis will be the first time the show has been aired live on the East and West Coast.
Demi Lovato and Jimmy Fallon Play Teen Girls in "Ew!' SketchDemi held her own in the comedy department, practicing kissing on an Ed Sheeran pillow (Fallon's had Mario Lopez's face on it).
Jennifer Lopez Struts Her Stuff in Silly Dance Battle on 'Fallon'Fallon went first, making up a silly dance called, “Skinny Jeans.” Lopez proceeded to show him up with a very J.Lo version of “Washing Machine Spin Cycle.”
Alessia Cara KILLS Nicki Minaj and Ariana Grande ImpressionsShe's the latest to play Jimmy Fallon's Wheel of Musical Impressions.
Vanessa Hudgens and Jimmy Fallon Remake FRIENDS ThemeThey'll be there for you!
Michelle Obama's Thank You Notes with Jimmy FallonThey had some fun discussing the President's....wadrobe...
Watch Niall Horan Perform 'This Town' on 'The Tonight Show'Horan is the second member of One Direction to play solo on the program. Zayn Malik performed “It’s You,” from 'Mind of Mine' in February.
Watch Jimmy Fallon Hold Back Tears While The Rock Surprises a Military FamilyBring your tissues.