D.J. Calvin Harris took to Twitter to announce his recent breakup with Rita Ora, so it only made sense that the "I Will Never Let You Down" singer would share her side of the story via the same social media site. Ora tweeted Wednesday, "I don't usually address speculation, but I've had an incredible time with Calvin, and i will treasure the memories," Neither Harris, 30, nor Ora, 23, has revealed the reason behind their split.