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Sam Greenwood/Getty Images
Power 100 rank: 88
Sport: IndyCar Series driver
Most recent notable achievement: 5th in 2009 IndyCar rankings
Earnings: $10.8 million
Key sponsors: GoDaddy.com, Tissot, Samsonite
Why she's on the list: As rare as successful female drivers are, even rarer is an attractive, marketable one. Companies have taken notice, and her racy GoDaddy.com ad during last year's Super Bowl was the evening's most viewed commercial, according to TiVo.