BIlly Joel

The Piano Man revisits one of the most distinct moments in his career as part of new HBO documentary.

Homeless after having an affair with his bandmate's wife, he was depressed to the point of near psychosis.

The two-part film will head to HBO this summer.

His condition is often misidentified as Alzheimer's disease.

There will also be documentaries about Depeche Mode, Billy Idol and Eddie Vedder.

Piano Man praised him as "the most powerful rock 'n' roll interpretive male singer I had heard" since Ray Charles.

Most of the affected show dates have already been rescheduled.

Piano man reveals work he’s carried with him for years but never played for anyone before.

They'll appear at MetLife Stadium next summer.

The Piano Man can name several other singers he tries to channel during his concerts.