(FILES) Photo dated December 31, 2013 shows US pop star Miley Cyrus performing in New York’s Times Square to celebrate the ball drop at the annual New Year’s Eve celebration. Cyrus has been hospitalized and has had to cancel a concert at the Sprint Center in Kansas City, Missouri, said o April 15, 2014. “Cyrus has been hospitalized for a severe allergic reaction to antibiotics and has been placed on medical rest by her doctors,” said a statement from the venue. AFP PHOTO/FILES/TIMOTHY A. CLARYTIMOTHY A. CLARY/AFP/Getty Images