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.

And So It Goes. The two-part HBO documentary — released on July 18 and July 25 — offered an inside look into the Piano Man’s life, exploring “the love, loss, and personal struggles that fuel his songwriting,

And So It Goes,” the singer is opening up about some tough moments with longtime friend and tourmate Elton John.