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Miley Cyrus, Demi Lovato, Selena Gomez, Taylor Swift

Kevin Mazur/Getty Images, AP Photo, Kevin Winter/Getty Images, Kevin Mazur/Getty Images

Oh, the Jonas Brothers' ears must have been ringing on Grammy night.

And it wasn't because of all that music at the Staples Center.

After the big awards show in downtown L.A., new besties and performance partners Miley Cyrus and Taylor Swift headed uptown to meet up with Selena Gomez and Demi Lovato at the Improv comedy club, where Lovato was hosting a screening party for the premiere of her new Disney Channel series Sonny With a Chance.

So what do these four do when they get together?

Oh, nothing too crazy.

Cyrus and Swift made a beeline for Gomez and Lovato's table when they arrived at about 7:45 p.m. "The girls all hung together at one table," says a fellow partygoer. "They were laughing and sharing french fries."

They gave Lovato a standing ovation at the end of the screening. "They hung out for a while after that, and then they all went out for hamburgers," the source said.

So much for those stories about any one of these gals fighting with another. No word if they now plan to hit the road and go on tour as music's newest quartet.