Jennifer Aniston isn’t the only big star who can’t shut up about her ex. Taylor Swift has admited that Joe Jonas dumped her–by phone no less–because he wanted to date actress Camilla Belle instead.

The 19-year-old’s secret romance with the “Lovebug” video model was outed in tabloid reports earlier this week.

“They’ve been together since we broke up,” Taylor said on the red carpet at Wednesday’s CMA Awards in Nashville. “That’s why we broke up – because he met her.”

Taylor, whose song “Always and Forever” is about her breakup with Joe, adds that guys should be aware that she may just write about them.

“You know what, if they don’t want me to write bad songs about them, they shouldn’t do bad things.”