Ozzy Osbourne: "I just can't believe it. I am in total shock about David Bowie's passing. It's crazy. Never in a million years did I think that we would lose such an amazing guy so young. I guess I thought he would live forever. I'm at a loss for words right now. Wow."

Gene Simmons: "Sad to say, Davie Bowie has passed. Condolences to the Bowie family. Bowie's 'Changes' and the entire Ziggy story songs were a major musical influence for me. He will be sorely missed."

Billy Idol: "Nearly brought to tears by sudden news of @DavidBowieReal David Bowie's passing RIP. He inspired us to go beyond the norm & reach out & dispel the void of life in 70's England wth r own art forms."

Queen's Brian May: "David Bowie gone. He was a fearsome talent, and the loss to music and culture from his passing is inestimable. In and out of our lives, always challenging and innovative, and� shocking. Sincere condolences to his family. But what a life. All hail, David Bowie, Star Man, Hero. RIP."