Adam Yauch - aka MCA - died on Friday at the age of 47 after a protracted battle with cancer.
"Adam Yauch brought a lot of positivity into the world and I think it's obvious to anyone how big of an influence the Beastie Boys were on me and so many others," rapper Eminem said in an official statement.
"They are trailblazers and pioneers and Adam will be sorely missed. My thoughts and prayers are with his family, Mike D., and Ad-Rock."
Born in Brooklyn, New York, Yauch taught himself to play bass in high school, forming a band for his 17th birthday party that would later become known the world over as Beastie Boys. With fellow members Michael "Mike D" Diamond and Adam "Adrock" Horovitz, Beastie Boys would go on to sell over 40 million records, release four #1 albums - including the first hip hop album ever to top the Billboard 200, the band's 1986 debut full length, Licensed To Ill - win three Grammys, and the MTV Video Vanguard Lifetime Achievement award.
Under the alias of Nathanial Hörnblowér, Yauch directed iconic Beastie Boys videos including "So Whatcha Want," "Intergalactic," "Body Movin" and "Ch-Check It Out."
Under his own name, Yauch directed last year's Fight For Your Right Revisited, an extended video for "Make Some Noise" from Beastie Boys' Hot Sauce Committee Part Two, starring Elijah Wood, Danny McBride and Seth Rogen as the 1986 Beastie Boys, making their way through a half hour of cameo-studded misadventures before squaring off against Jack Black, Will Ferrell and John C. Reilly as Beastie Boys of the future.
Yauch is survived by his wife Dechen and his daughter Tenzin Losel, as well as his parents Frances and Noel Yauch.