The directors of "Billy Joel: And So It Goes" recently opened up about the making of the new HBO documentary and provided an update on the legendary singer’s health.

And So It Goes' interviews all four of his wives and candidly examines singer's struggles with money, alcohol and critics

Co-director Susan Lacy told Good Morning America on Wednesday (July 16) that Joel has been “doing physical therapy, he’s healing, he’s working on getting better.” In May, Joel canceled all his planned summer shows due to the condition, which can affect vision, hearing and balance.