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, one of the three members who make up , has died at the age of 47 after a battling cancer.

Yauch, , formed The Beastie Boys with friends Mike D and Ad-Roc, creating some of the most well known hits in music with their melding of rock and hip-hop.

Adam had been treated for a cancerous paratid gland and lymph node, undergoing surgery and radiation. No word on if his death was related to the cancer.

If you believe in the rule of threes, there’s one more death left.