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.
WATCH: Jimmy Fallon & The Roots Shout Out Metro Detroit!It was show number 586!
Must See: Chrissy Teigen Fixes John Legend's Zipper on Fallon!A good partner looks out for you - even on National TV!
Jimmy Fallon and the Roots Play 'Enter Sandman' with Metallica on Classroom InstrumentsOne of my favorite Jimmy Fallon bits takes on one of the great rock songs of all time.
Justin Timberlake Addresses his Illegal Voting SelfieJustin Timberlake may have broken the law, but he wasn't aware that he was doing it.