Breaking up is hard to do, even for celebrities. Take a look at the notable splits of 2013.
Katy Perry and John Mayer: In March, "multiple sources" told Us Weekly that the couple's relationship had come to an end, but by summer it looked as though the pair was back together. The couple also reportedly separated for a bit in August 2012 before getting back together in September.
Seoul National University/Handout/Reuters
Lucy Richardson/ Reuters
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