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Once a match made in electro-pop heaven, Calvin Harris and Rita Ora's professional relationship has hit a sour note. And while the end of a romantic relationship is usually never fun, these two pop stars are getting more and more public about their issues with one another, and it's starting to affect the music.

Ora was announced to perform her Harris-produced banger "I Will Never Let You Down" at the Teen Choice Awards last Sunday, before she mysteriously pulled out of the show days before. The 50 Shades of Grey star later confirmed to Ryan Seacrest that Harris had blocked the performance because "he wrote and produced the song."

After complimenting Harris' musical skills and mentioning that she respected him as both an artist and producer, she explained, "So, [Harris] has to approve anything TV-wise, for anybody that doesn't get it and obviously, he owns the rights to [use the song] and he didn't approve the Teen Choice Awards." Oof.

While Harris didn't go on a radio station to reveal his reasons for the cut, he did add a few comments to the mix saying he "had a damn good reason" for nixing the gig. See what he wrote on Twitter below:

Fans can look forward to Rita performing with Iggy Azalea at the 2014 VMAs later this month.