17 Celebrity Music Video Cameos

Who knew Alexander Skarsgard and Lady Gaga were pals?!? The former showed up in the latter's video for "Paparazzi."

Yup, that's him. This is taken from Arcade Fire's video for "We Exist."

Remember Bennifer? Ben Affleck appears in J. Lo's video for "Jenny from the Block."

Ben Stiller and Diddy?!? Yup, the actor appeared in the video for "Bad Boy for Life."

The Mindy Project star and Glee star stopped by Sam Smith's video for "I'm Not the Only One."

We all adore Christopher Walken. He made a cameo in 2001 in the Fatboy Slim video for "Weapon of Choice."

It's Seth Rogen, Danny McBride and Elijah Wood! They're in the Beastie Boys video for "Make Some Noise."

Welcome to Miami! Eva Mendes appears here in a fun Will Smith video.

HA! Gotta love this cameo by Jake Gyllenhaal in Vampire Weekend's "Giving Up the Gun."

James Van Der Beek puts on his serious face here for the Kesha music video for "Blow."

Jennifer Love Hewitt is our hero/heroine. Here she is in a 2001 music video by Enrique Iglesias.

Yup, this is Anne Hathaway, Kristen Stewart and Brie Larson. They are in drag for Jenny Lewis' "Just One of the Guys."

Megan Fox and Dominic Monaghan played a couple going through tough times in Eminem and Rihanna's "Love the Way You Lie."

LONG before she got pregnant by Ashton Kutcher, Mila Kunis appeared in the Aerosmith video for "Jaded" in 2000.

It's Jason Bateman, Jason Sudeikis, Ed Helms and Will Forte! They all stopped by the video by Mumford & Sons' for "Hopeless Wanderer."

OOOOH YEAHH!! Scarlett Johansson kisses Justin Timberlake here for the video "What Goes Around…Comes Around."

Smile, Sophia Bush! You're in the video for "Carried Away" by Passion Pit.