Beastie Boys rapper and co-founder Adam Yauch, who went by the stage name MCA, passed away May 4 after a long battle with cancer. Legions of fans — celebs included — have taken to Twitter to express their shock and sadness over his untimely death. Yauch was only 47.
Lance Armstrong: Crushed to hear the news of Adam Yauch's passing.
Benji Madden: Thoughts and prayers out to the Beastie Boys and their friends and families. This news hits hard. The Beastie Boys are 1of the reasons I do music&MCA was the captain. Thanx for everythin MCA. Rest in Peace.
Justin Timberlake: 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.
Rainn Wilson: RIP Adam Yauch (MCA of the Beastie Boys). He was a super-genius, a visionary and, most importantly, a really good person.
Kevin Smith: RIP Adam Yauch. You made my teenage years more fun and your art made it easier for me to do what I do. For a Beastie, you sure were a beaut.
Donald Glover: Adam Yauch was an amazing artist and one of the nicest people I've ever met. His music was some of my favorite. Truly saddened. RIP MCA.
Kal Penn: Sad news about #MCA
Chemical Brothers: RIP Adam Yauch. thanks for the amazing music,continual inspiration
Fred Durst: A very sad day indeed. Adam Yauch RIP.
Marlon Wayans: Rest in peace Adam Yauch. Beastie Boys were always the "coolest whiteboys" when I was growing up. They erased color lines the opposite way
Jimmy Fallon: So sad to hear of the passing of Adam Yauch. He was a great performer, director, father, humanitarian and New Yorker.
Busy Philipps: @Colin_Hanks I thought about you as soon as I heard. AND I thought about "NO SLEEP TILL BROOKLYN!" & seeing them @ the Great Western Forum..
Ghostface Killah: My condolences to Adam "MCA" Yauch Family & the Beastie Boys. My brothers & I felt that pain before as well. Sad Day.
Cee Lo Green: Now playing: something's got to give: BEASTIE BOYS R.I.P. M.C.A. One of the best hip-hop groups of all time!much love to MIKE-D and AD-ROCK
Ke$ha: Damn. RIP MCA. Such a huge influence on me every day. You will not be forgotten.
Olivia Munn: The Beastie Boys inspired a generation to be original & genuine. We lost a true artist today. RIP MC.
Ed Norton: can't do justice in 140 to the great spirit of Adam Yauch. As generous and cool as they come. Such an influence on so many Really sad day.