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Rihanna wore three different looks within four hours at tonight's Grammy Awards! First, she walked the red carpet in a custom red Azzedine Alaïa dress, then she performed "Stay" in a black curve-hugging column, and finally, she took part in the Bob Marley tribute wearing a sparkling two-piece white and gold number. So which of RiRi's three dresses do you like best? Vote below!