The singer's ex Katie Lee said Joel always had "a little resentment" toward her for pushing him to seek treatment.

Billy Joel Says Elton John Crossed a Line—And It Nearly Ended Their Friendship originally appeared on Parade. There was a time when seeing Billy Joel and Elton John share a stage felt like magic. Two piano legends, one spotlight, endless hits. But behind the scenes? It wasn’t always harmony.

Billy Joel is opening up about a tough moment with longtime friend and tourmate Elton John. In the second part of the new two-part HBO Documentary, "Billy Joel: And So It Goes," the "New York State of Mind" singer shared how John's public comments that he needed rehab strained their friendship.

Billy Joel opens up about DUI rumors, his friendship fallout with Elton John and his struggles with alcohol in the HBO documentary 'And So It Goes'

Now, a two-part HBO documentary is exploring the life, career and personal struggles of Billy Joel, providing an expansive look at the man behind the music. Billy Joel’s former business manager and wife,

One topic the exhaustive doc doesn’t address is how Joel went from a scruffy aspiring metal head to a guy whose public uniform was a coat and tie.

A 115-song playlist covering Billy Joel's career hit YouTube, Spotify and other streaming services on July 26. Joel introduces many of the songs.