Russell Simmons, Rev Run, and Others' Twitter Reactions to Death of Beastie Boys' Adam Yauch

Beastie Boys' MCA (AKA Adam Yauch), center, with his homeboys Ad-Rock and Mike D.

See Crossfade's obituary for Adam Yauch as well as Crossfade's memorial slideshow of Beastie Boys concert photos.

The Beastie Boys' Adam Yauch is dead. But the Beastie Boys live forever.

The rap crew's global cultural influence was cemented the moment they dropped the atomic boulder of musicality known as 1984's Licensed To Ill.

Everybody from Russel Simmons to Q-Tip, Boy George, Atmosphere, Billie Joe Armstrong, and Fred Durst will be crying tears in their beers tonight over the loss of MCA. And the proof of how much the world loved this Beastie Boy is all over Twitter.

Russel Simmons and Rick Rubin founded Def Jam Records, which signed the Beastie Boys and put out their classic debut album Licensed To Ill.

RIP Adam Yauch. My thoughts... bit.ly/KlPHkO

-- Russell Simmons (@UncleRUSH) May 4, 2012

Run D.M.C.'s Rev Run is Russel Simmons brother and he knew Yauch well.

R I P Adam... I'm devastated.Praying for Adam Yauch's family from the legendary Beastie Boys. Youll be missed!

-- Rev Run (@RevRunWisdom) May 4, 2012

Def Jam Records is probably still eating off the Beasties.

Man...that one hurts. Our prayers go out to Adam Yauch and his family. #MCA #BEASTIEBOYS Rest Well.

-- Def Jam Recordings (@DefJamRecords) May 4, 2012

Rapper Atmosphere would probably not exist without Yauch.

wow. rest in peace adam yauch.

-- atmosphere (@atmosphere) May 4, 2012

Boy George shared Yauch's spiritual beliefs and notes his global influence.

Such sad news about Beastie Boy Adam Yauch. A fellow Buddhist and part of hip hop history!! R.I.P!

-- boygeorge (@BoyGeorge) May 4, 2012