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Kate Beckinsale

6. Kate Beckinsale, 38

The British beauty, who has starred in such action flicks as "Underworld" and "Van Helsing" is simply breathtaking. Most 20-year-olds would kill to look like her.

AskMen's Most Desirable Women Over 30

While females in their 20s definitely have it going on, some might say that a woman hits her prime in her 30s. AskMen.com's 99 Most Desirable Women of 2012 list includes several women over the age of (gasp!) 30. Check out the Top 10!