6. Taylor Swift's Exes
Jake Gyllenhaal and John Mayer learned a hard lesson in 2012... don't mess with Taylor Swift. Both guys ended up on the wrong end of a scorned love song as a result of breaking up with the country crooner. And they are never, ever, ever, ever getting back together. Like ever. —XFINITY Entertainment Staff (Photos by Michael Loccisano, Kevin Winter/Getty Images)
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