Joel previously started rehab in 2005 following what he called an "ultimatum" from his then-wife, Katie Lee. Joel revealed in the documentary that he didn't like being compared to Elton John, even if they were close friends and frequent tourmates.

John’s full quote wasn’t exactly subtle. He blamed Joel’s alcoholism for tour cancellations, accused him of “coasting,” and described Joel’s rehab stints as “light,” quipping that when he went to rehab, he had to clean the floors, while Joel had TVs.