20. Britney Spears: $58 million

Britney Spears sneaks in to Forbes' list at number 20 after a busy year in which she performed over 75 shows as part of her Femme Fatale tour, while her album of the same name went platinum.

The 30-year-old also earned big money through her fragrance line with Elizabeth Arden, along with other endorsements, and the next 12 months are certain to keep her in the public eye due to her role on 'X Factor USA'.