5. Ashton Kutcher and Demi Moore

 Ashton Kutcher and Demi Moore at the premiere of 'No Strings Attached' at the Regency Village Theater in Los Angeles, California on January 11, 2011Joe Seer/Bigstock.com

Age Gap: 15 Years

Demi Moore literally grabbed eyeballs when she announced her relationship with actor Ashton Kutcher who was 15 years her junior. The duo got married in 2005 and seemed to be perfectly in love until 2011 when news of Ashton’s alleged cheating reared its ugly head. Demi Moore later filed for divorce.

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