The 22-year-old singer wowed the audience wearing a piece of black skin-tight PVC catsuit, which showed off her curvy figure very well during the performance. She also played a guitar while debuting her new song, Rockstar 101, which features Slash from Guns 'N' Roses although he was absent from the performance.
Check out the video for Rihanna performing Rockstar 101 on the American Idol below: