Oh no! Austin Mahone essentially just dissed his ex Camila Cabello of Fifth Harmony.

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The former couple called it quits toward the end of last year only after confirming their relationship within a few weeks of ending things.

The former couple was together for about a year though, keeping things underwraps.

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Since their split, it seemed like they were on good terms, but Mahone recently chatted with MTV News and the site revealed on Thursday that the 19-year-old Texan has moved on with Becky G!

"We're dating," Mahone said of his relationship status with Becky G, adding, "I never had a, like a real relationship before so it's, it's pretty crazy."

Interestingly enough, the star had nothing but lovely things to say about Cabello when he dated her. He opened up to Teen Vogue while he was their cover star for December/January.

"She's an amazing girl, and we have the best time together," Mahone revealed to Teen Vogue, adding, "I wasn't looking for a relationship, but we became really good friends when we were on tour."

Now with him basically calling their relationship not real, Cabello seems to have fired back indirectly via Twitter.

She tweeted Thursday, "damn...good to know," and by the looks of it Harmonizers have her back as many have tweeted her that she deserves better and that Mahone is stupid for saying such a remark.

Tags: fifth harmony camila cabello austin mahone