Aww, even after their lil faux-lesbo swirlin love affair in that “Telephone” video, Bey and Gaga have a little beef brewing:

Beyonce has declared war on pop rival Lady Gaga — and man, it’s gonna get ug-lee!!! The two recorded the No. 1 hit “Telephone” together, but they no longer speak, sources say, and R&B diva Beyonce has blasted Gaga as a “selfish egomaniac.” Now Gaga -aka Stefani Germanotta – has fired back, branding Beyonce “just another jealous hater,” an insider says.

“The bad blood between Beyonce and Gaga has been brewing for months, but it really exploded after the Grammy Awards in February,” the insider said. The talented “Paparazzi” singer, 24, won three Grammys, but it was her eye-popping arrival inside a giant egg, carried by attendants dressed in gold, that got people talking.

“Beyonce thought Gaga’s entrance was way over the top and ridiculously self-serving,” said the insider. “Every other artist worked the red carpet in a traditional manner, but Gaga made it all about her.” “At this point, Gaga is used to people criticizing her. It’s part of being so successful,” explained a source close to Lady Gaga. “But she never expected it from Beyonce, whom she saw as a friend and supporter. Gaga plans to confront her the next time they run into each other and demand an apology.”

But Beyonce, 29, remains upset at how Gaga tries to steal the spotlight at public events with other stars, disclosed the insider. “Beyonce believes that musicians should let their talent do the talking, and she finds it really tacky that Gaga constantly tries to one-up everyone with her ridiculous fashion statements.

“She’s telling people that she wants to take Gaga down a few pegs.”

Uhhhh, we’re not sure if this even sounds like something Beyonce would say, but hey…