At 16, the budding star was signed by Jay-Z, who at the time was CEO of Def Jam Recordings. In May 2005, Rihanna released her first debut single, 'Pon de Replay', and her first album, Music of the Sun. In 2006, she had her first number one hit with 'SOS', which was to set the tone for the rest of her music career. With nine Grammy Awards under her belt, Rihanna has reportedly sold more than 250 million records to date.