Bret Michaels Stuns Audience with Surprise Performance on ‘American Idol’

Less than one week after he was admitted to a hospital for suffering a "warning stroke" that led to the discovery of a hole in his heart, Poison frontman Bret Michaels made a surprise performance on Wednesday's "American Idol" finale.

Michaels, along with former "Idol" contestant Casey James, performed the Poison hit "Every Rose Has Its Thorn." Taking the stage, Michaels received a standing ovation from the audience before he even emerged from the shadows. The "Celebrity Apprentice" winner recently grabbed headlines regarding his health, including a potentially life-threatening brain hemorrhage in April.

The resilient rocker also attended the "Celebrity Apprentice" finale last Sunday in New York City, just days after his latest hospitalization.