16. Maria Sharapova
Age: 24
2010-2011 Income: $24 Million

Despite a softening record on court, Sharapova remains the top-earning female athlete in the world. She renewed her Nike deal at the start of 2010 and it has been very lucrative for the former No. 1 player. She receives royalties on her own line of apparel which was up 26% last year, as well as for her ballet flat which was the top selling shoe in 2010 at Cole Haan, a Nike subsidiary. Sharapova broke the hearts of single, male tennis fans everywhere in October when she announced her engagement to NBA player Sasha Vujacic.