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."