The Tonight Show Starring Jimmy Fallon

Will Smith, U2

Actor Will Smith; U2 performs.

Jerry Seinfeld, Kristen Wiig, Lady Gaga

Comic Jerry Seinfeld; actress Kristen Wiig; Lady Gaga performs.

Bradley Cooper, Tim McGraw

Actor Bradley Cooper; Tim McGraw performs.

Michelle Obama, Will Ferrell, Arcade Fire

First lady Michelle Obama; actor Will Ferrell; Arcade Fire performs.

Justin Timberlake

Actor Justin Timberlake.

Bradley Cooper, Harry Connick Jr., Big K.R.I.T. featuring Raphael Saadiq

Actor Bradley Cooper; singer Harry Connick, Jr.; Big K.R.I.T. performs with Raphael Saadiq.

Nicole Kidman, Patton Oswalt, the War on Drugs

Actress Nicole Kidman; stand-up comedian Patton Oswalt; The War on Drugs performs.

Liam Neeson, Fred Armisen, Carrie Brownstein

Actor Liam Neeson; actor Fred Armisen; Carrie Brownstein performs; comedian Simon Amstell.

Lena Dunham, J.K. Simmons, Ghostface Killah with the Revelations featuring AZ and Kool G Rap

Actress Lena Dunham; actor J.K. Simmons; rapper Ghostface Killah performs with special music guests rapper AZ and Kool G Rap.

Don Cheadle, Kate Bosworth

Actor Don Cheadle; actress Kate Bosworth; rapper LeCrae performs

Ryan Reynolds, Carly Fiorina, Shawn Mendes

Anne Hathaway, Anthony Anderson, A Great Big World ft. Futuristic

James Spader, Andrew Rannells, Brian Regan

Joseph Gordon-Levitt, Chris Hardwick, Big Grams

Olivia Wilde, Fred Savage, Walk the Moon