When it comes to Hollywood romances, age ain't nothing but a number. Celebrity couples like Demi Moore and Ashton Kutcher, Calista Flockhart and Harrison Ford, and Michael Douglas and Catherine Zeta-Jones may endure endless teasing about their age differences during late-show monologues or in the Daily Blabber, but it hasn't caused them to retire their relationships just yet. So let's honor those celeb couples who took a chance on love despite the age obstacle and are still together to tell the story.