Cameron and Justin may be officially over-but someone reportedly forgot to get that memo to Cammy.

Golden Globes sources dish that one of the Worst Dressed Women of the Evening went into full bitch mode when she spied J.T chatting with former Seventh Heaven star, Jessica Biel. J.B is rumored to be dating Yankees’ frontman Derek Jeter, but that didn’t stop Cammy D. from allegedly putting Jess in her place for “flirting with Justin.”

Cam reportedly followed Justin to the In Style party at the Hilton Oasis, where “they had an awkward conversation,” says a snitching New York City source. She then mysteriously popped up at the Beverly Hilton rooftop for the party thrown by Universial Studios. That’s where she is reported to have spotted Jess and Just, followed by a verbal confrontation with J.B.

“If that’s how she wants to get him back, it won’t work,” the New York source says. “She’s desperate.” Cameron’s people haven’t commented.