06/16/2011 12:56 pm ET Updated Aug 16, 2011

Celebrity Splits: Couples Calling Off Their Engagements

Poor playboy! On Tuesday, Hugh Hefner Tweeted that his engagement to Playmate Crystal Harris, sixty years his junior, was off. The wedding was set for June 18, but apparently she "had a change of heart." The turn of events made us wonder: which other engaged celebrity couples jumped ship shortly before heading down the aisle?

Click through the pictures below to see our top picks: