The Birthday Sex star was due to start his U.S. tour on Thursday night (11Aug16) in Scottsdale, Arizona but he announced on Twitter a day earlier that the trek would no longer be taking place, but didn't reveal the reason, and promised fans the concerts would be rescheduled in the near future.

He tweeted, "To all my Fans: Due to unforeseen circumstances, I will have to postpone my US Tour. An announcement of new dates will be provided soon. Thank you for rocking with me. #LateNights."

The original tour, to promote third album Late Nights, was due to finish in Washington, D.C. on 02 October (16).