Pink Slams "Trouble Makers" Christina Aguilera, Britney Spears

Credit: Jason Merritt/Getty Images; Jon Furniss/WireImage.com; Jason Merritt/Getty Images

So much for sticking together.

Hot on the heels of Christina Aguilera's drunken arrest, her former "Lady Marmalade" collaborator Pink slammed the 30-year-old pop star on Twitter Tuesday.

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"Out of myself, Britney [Spears] and Christina, didn't everyone think I was gonna be the troublemaker?" the 31-year-old mother-to-be wrote. "LOOK MA! No CUFFS!"

(Pink also collaborated with Spears, 29, for a 2004 Pepsi commercial.)

Aguilera and her boyfriend, Matthew Rutler, were arrested early Tuesday morning in West Hollywood, the L.A. County Sheriff's Department confirms to UsMagazine.com.

Rutler, 25, was arrested for driving under the influence, while Aguilera -- who was his passenger -- was booked on a misdemeanor charge of public intoxication.

According to insiders, Pink isn't the only person who's fed up with Aguilera's boozy antics. A source told a recent issue of Us Weekly that the "Not Myself Tonight" singer's friends think she's "really spiraling" out of control. "I would be shocked if she's not in rehab in the next month or two," the source added.