Adam Yauch aka MCA of the Beastie Boys dead at 47: Celebrity reactions

Slideshow posted in Photos | Friday, May 04, 2012

3 of 20: Lance Armstrong Tweeted about the loss of the famed musician Adam Yauch.

'Crushed to hear the news of Adam Yauch's passing. #RIPMCA,' he Tweeted.

Yauch died after years of battling cancer. Armstrong also battled the disease, having brain surgery, testicular surgery and extensive chemotherapy, and has been in remission since 1997.

(Pictured: Tour de France champion Lance Armstrong appears in this undated photo.) (Photo courtesy of lancearmstrong.com)