Sailor Brinkley-Cook is more than confident that Billy Joel will be back on tour in no time. "He's doing great," Brinkley-Cook, 26, exclusively told Us Weekly on Tuesday, March 11, while celebrating the grand opening of Planet Hollywood Times Square.

"Billy Joel's upcoming concert dates will be rescheduled due to a medical condition," the statement began. "The current tour will be postponed for four months to allow him to recover from recent surgery and to undergo physical therapy under the supervision of his doctors."

Billy Joel is "totally healthy", Christie Brinkley's daughter has insisted. The 75-year-old singer recently announced he was postponing his tour by several months for medical reasons but Sailor Brinkley-Cook - who is the offspring of the 'Uptown Girl' hitmaker's second wife and her now ex-husband Peter Cook - has reassured fans he is "doing great" and will be back on stage as soon as he can.

Billy Joel won’t be lighting up the stage for a few months — but he’s making sure fans know he’ll be back. On Tuesday, March 11, the 75-year-old music legend took to Instagram to announce that his upcoming tour dates are being pushed back so he can recover from a recent surgery.

Billy Joel announced he will be postponing his tour for four months due to a "medical condition" on Tuesday. The legendary rock artist shared a statement to Instagram that he is recovering from a recent surgery and has to "undergo physical therapy under the supervision of his doctors.