John Mayer, Taylor Swift, and Katy Perry
The "bad blood" between Taylor Swift and Katy Perry has lasted for a number of years. Although Swift has seemingly extended an olive branch to Perry, their long and complicated feud allegedly stems from a spat over backup dancers. However, fans have speculated whether the fact that they both dated Mayer may have added some fuel to the fire. Mayer and Swift were an item in 2009, and Mayer and Perry first got together in 2012. "It was wrong, don't you think nineteen's too young to be played by your dark, twisted games when I loved you so," Swift wrote in her song "Dear John." Yikes.
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