R&B star Rihanna teamed up with rapper Kanye West for her first public performance since the alleged assault controversy with ex boyfriend Chris Brown. The ‘Rehab’ singer, who was dressed in a black Dolce and Gabbana power suit, joined Kanye West on stage at the Metropolitan Museum of Art Costume Institute Gala in New York on Monday. The pair performed a duet of Kanye’s song ‘Say You Will’ before Rihanna belted out an emotional rendition of her hit ‘Live Your Life’, Female First online reported. “Kanye asked her to do it. It was his idea, but Vogue editor Anna Wintour obviously had to approve it. Anna was at the run-through during the day and was so into it,” a source said. The audience applauded wildly when the 21-year-old star walked on stage, with many shouting messages of support. After her performance, the star was seen chatting to Madonna, Victoria Beckham, and fashion designers Marc Jacobs and Stella McCartney. Rihanna last performed at her January concert this year in Los Angeles.