We would've given our left arm to be Robyn Troup last night: The 19-year-old "My Grammy Moment" contest winner got to sing "My Love" with Justin Timberlake and T.I. live at the show! "This is just the most amazing thing that ever happened to me," she said after the show. "I just zoned in on Mary J. Blige, Mary J. Blige. She was right there and she's such an inspiration to me." And Robyn totally rocked her performance. Even Justin thought so. "You did so good, girl," he told her after the song. Sigh!