By Katie Mathewson, Molly McGonigle and Stacie Anthony
As anyone who has gone through a bad breakup knows, sometimes the best way to get back at an ex is to show them what they're missing. From radical makeovers to major weight loss, see how stars use their looks as sweet revenge on their exes!
Summer lovin' had Julianne Hough and Ryan Seacrest a blast in 2010 -- they were spotted getting cozy all over Los Angeles. Ryan was busy with his dozens of ventures, including hosting "American Idol," while Julianne spent time with flicks like "Burlesque," "Footloose" and "Rock of Ages." Their love couldn't survive their busy schedules, though, and Julianne and Ryan split in March 2013 after two years together.