I am devastated to have to postpone tonight and tomorrow’s opening at Caesars. The prep and rehearsals have taken a toll on my voice,” she wrote in a statement shared on Instagram Friday.

Kelly Clarkson announced that she would be canceling the first two nights of her brand-new Las Vegas residency shortly before she was due to take the stage for the first time on Friday night. Clarkson wrote in an Instagram post,

Kelly Clarkson has been forced to delay the opening weekend of her new Las Vegas residency, Studio Sessions, after experiencing vocal strain. The original debut—set for July 4 at Caesars Palace—was canceled just 90 minutes before showtime,