20. Kat Von D & Deadmau5
Kat Von D and Joel Zimmerman (also known as Deadmau5) began dating in September 2012, only to breakup later that year. Their relationship didn't end there though. The two got engaged after Zimmerman proposed over Twitter in December 2012. They officially parted ways 2013, with Von D claiming Zimmerman's infidelity as the reason for their split.
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