Billy Joel says there was once "bad blood" between him and Elton John. In the second part of a new two-part HBO documentary Billy Joel: And So It Goes, the "Piano Man" singer opens up about how the "Your Song" musician's public declaration that he needed rehab caused tension between them.

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”.