'American Idol' Season 11 best and worst moments

'American Idol' Season 11 best and worst moments: Somehow Rihanna lucked out and didnt have to perform with any Idols. So she chose to dress up like a vampire and be really weird. Natch.

(FOX)

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Rihanna, Queen of the Damned

Somehow Rihanna lucked out and didn't have to perform with any Idols. So she chose to dress up like a vampire and be really weird. Natch.