This is about to get ugly.

Fans were disappointed to learn Jordin Sparks, 26, had split from her boyfriend of 10 months Sage the Gemini, 23, earlier this month — but we bet they change their tune after hearing what he REALLY thinks of the American Idol winner.

RELATED: Find Out Why Lea Michele and Matthew Paetz Split

"Everything was f–king horrible," he tells ex-fiancée Curium Hurley in a leaked phone conversation.

sage the gemini and jordin sparks

Jordin Sparks and Sage the Gemini.

"That s–t was f–king dumb. She got on my nerves. I wanted to stab her. All of that s–t. Don't get me wrong, she's cool, she's level-headed, whatever, but she's not no regular person — everybody on the outside looking in [thinks] it's hella perfect."

This is a far cry from Sage’s public plea to win Jordin back, which has since been deleted from Instagram. The brunette beauty — who was previously linked to Jason DeRulo — opened up to In Touch about their relationship back in August.

jordin sparks jason derulo getty images

Jordin Sparks and Jason DeRulo.

"He’s an incredible guy and we laugh all the time. I’m very happy,” Jordin said. “He just makes me feel so loved.”

Hear the full audio below.

https://www.youtube.com/watch?v=DKlpG9xgrG4