The singer showed no apparent signs of illness as she performed a medley of her hits on the live show Friday. She wore a black outfit studded with spikes and, at one point, swung a gold, spiked ball on a chain into the windshield of a taxi on the stage.
The concert cancellation was announced from the stage Thursday night after opening acts Jason Derulo and Semi Precious Weapons had already performed.
A statement released by the school from Lady Gaga's tour management said she'd suffered a sudden illness and that medical personnel had advised her not to perform.
The concert was rescheduled for Jan. 26.
