Hollywood's Power Couples

Ashton Kutcher and Demi Moore: Hollywood's most high-profile cougar-driven relationship has to be between the sexy practical joker Kutcher, 32, and the 47-year-old Ghost star. The pair married in 2005 and even Demi's ex, Bruce Willis, was in attendance at the star-studded ceremony. The pair recently have made headlines for their frequent, and sometimes personal, revelations on the social networking Web site, Twitter.