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.

In the new documentary Billy Joel: And So It Goes, the Piano Man singer admitted that there was “bad blood” between himself and Sir Elton after an interview the latter gave to Rolling Stone in 2011, opening up about how past joint tours of theirs had to be cancelled due to “illnesses and various other things” including the former’s “alcoholism”.