Rihanna July 19, 2011

Grammy winner Rihanna, one of the most well-known pop singers in the world. She has had several number-one singles on the Billboard Hot 100 chart including, 'Rude Boy,' Umbrella,' 'Disturbia,' and 'Don't Stop the Music.' She is currently touring in support of her fifth album, "Loud," which features number one singles "Only Girl" and "What's My Name."