Billy Joel reveals that he twice attempted suicide in his new HBO documentary 'And So It Goes,' and that one of the attempts left him in a coma.

Billy Joel, also known as the Piano Man, is one of the most respected entertainers in the world - but the famous singer has faced his fair share of tragedy over the years

And So It Goes, premiered at the Tribeca Festival in New York on Wednesday and it featured a section about one of the most difficult periods in the 76-year-old singer's life. According to People, the film co-directed by Susan Lacy and Jessica Levin delves into a dark incident early in Joel's career when he attempted suicide two times after having an affair with a former bandmate's wife.