Many celebrities have shared on thing in common, ex-girlfriend and boyfriends, but one that we didn't expect to hear about was Calvin Harris and Bruno Mars' former romance with Rita Ora.

The EDM DJ and "Uptown Funk" singer are both at the top of their game with creating catching hit singles, topping the Billboard charts, but that's not the only thing they have in common. They both used to date the "I Will Never Let You Down" singer, with whom they both broke it off with as well.

According to reports, both relationships ended because of their crazy work schedules, however, other reasons were also involved.