7. Katy Perry

After Russell Brand reportedly asked her for a divorce via text message, Katy Perry moved on to John Mayer. Then they broke up, she dated dick-pic-enthusiast Diplo (who mocks Taylor Swift’s derriere online and just got an ex pregnant), and then got back together with John Mayer this month. Mayer has a track record of saying awful things about all of his exes, so maybe Perry got back together with him so he’d keep her secrets a little while longer.