The 'Stay' hitmaker, who kicked off her new Diamonds World Tour last week, came down with a severe combination of laryngitis and flu immediately after her debut show and pulled out of her performance in Baltimore on Tuesday night, reported Rolling Stone magazine.
The singer is said to be extremely disappointed that she has only been able to perform one show to date.
Doctors have suggested that she work less and take more rest. Both of her shows in Baltimore and Boston are being rescheduled.