Christina Aguilera continues to spin out of control.
L.A. County Sheriff's Department confirms to UsMagazine.com that the star, 30, was arrested early Tuesday morning in West Hollywood -- along with her boyfriend, Matthew Rutler.
After Rutler, 25, was observed driving erratically, cops pulled over his car, in which Aguilera was a passenger. At 2:45 a.m., Rutler was arrested for driving under the influence -- and the "Not Myself Tonight" singer was booked on a misdemeanor charge of public intoxication.
"They were cooperative, no problems at all," Sgt. Michael Thomas of West Hollywood Sheriff's Department tells Us of the arrest.
Thomas explained to Us that Aguilera was taken into custody "for her own safety. It's kind of a welfare 'arrest.' Not a criminal arrest. She was intoxicated -- too much to be in public. No one was available to take care of her, because the person she was with was arrested for drunk driving. When it's determined she's sober, she'll be released."
According to the L.A. Times, Aguilera's bail was set to $250; Rutler's bail is $30,000.
Pals of the Burlesque star spoke up in a recent issue of Us Weekly about Aguilera's increasingly rowdy, drunken antics -- which included a New Year's Eve blowout fight with her mom, a booze-filled night of crying at L.A. club The Dime, and even passing out in star Jeremy Renner's bed during his 40th birthday bash Jan. 8.
"Her friends are fed up," one source said of the star. "She's really spiraling. I would be shocked if she's not in rehab in the next month or two."
She and husband Jordan Bratman split up last September; the couple were married for five years and have a 3-year-old son, Max.