Adam Yauch, one of the c0-founders of the Beastie Boys has died, aged 47.
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Adam co-founded the Beastie Boys with Mike 'Mike D' Diamond and Adam 'Ad-Rock' Horowitz in 1979.
The Beastie Boys had attempted to make several comebacks recently, but Adam's cancer treatment ended up postponing the release of their latest album, as well as preventing them from performing live.
Celebrity tributes are already flooding in, with Boy George tweeting: "Such sad news about Beastie Boy Adam Yauch. A fellow Buddhist and part of hip hop history!! R.I.P!"
As soon as the news was confirmed, #RIPMCA began trending on Twitter - a tribute to Adam, who was also known as MCA.