Jordin cancels concert due to vocal hemorrhage

Jordin Sparks was forced to cancel her concert today at the Bryce Jordan Center in University Park, Pa. The reason: her vocal chords have suffered an "acute hemorrhage," which could lead to permanent damage if not treated, according to her doctor.

Jordin is currently back at home in Arizona. She was supposed to open for Alicia Keys beginning tonight in Hampton, Va., to kick off Keys' "As I Am" North American tour.