Adam Yauch, pronounced YOWK, of the Beastie Boys passed away yesterday at the age of 47. Also known as ‘MCA’, he was diagnosed with throat cancer in 2009.  He was in hospital since April 14th.  He deteriorated over last two weeks.  Conscious to the end, he died at 9am. 1986′s “Licensed to Ill, was the first hip-hop album to go #1.

Tweets: “#restinpeaceMCA 1 of my favorite hiphop groups…hiphop raised a lot of us & now we have to wake up because are hero’s are dying too young” – will.i.am (Black Eyed Peas)

“Rest in Peace Adam Yauch. Our condolences to your friends and family” – Duran Duran

“R.I.P. Adam Yauch Beastie Boys #RIPMCA” -  MC Hammer

“Crushed to hear the news of Adam Yauch’s passing. A true pioneer of art. My thoughts and prayers are with his family and loved ones. #RIPMCA” – Justin Timberlake

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

“I’m going Twitter silent today in honor of MCA.. Rest In Peace homie.” – Ice T

Coldplay paid tribute to Adam with a cover of Fight For Your Right, on piano last night at the Hollywood Bowl. The Red Hot Chili Peppers dedicated last night’s show in Newark to Adam Yauch.

Yauch is survived by his wife and daughter.