R+B star Alicia Keys has been forced to axe two U.K. concerts on her doctor's orders, after falling ill with a bout of laryngitis. The Fallin' singer was due to be performing in Glasgow, Scotland on Monday (25Feb08) and Manchester, England on Tuesday (26Feb08). Keys' publicist Patti Webster confirmed the gigs have been postponed to give the singer's voice a chance to recover. The U.K. dates - part of her European tour - will be rescheduled.