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Most times when a singer at a concert lets an audience member sing a line from one of their songs, the result is... fine. But on March 20, the audience member that Rihanna gave the mic to during her song "FourFiveSeconds" was so good that it even made Rihanna say "whoa." And Rihanna isn't phased by anything. She's Rihanna.

Of course, he freaked out afterward:

Sources: h/t Mashable