(NEW YORK) -- She may have just signed on to judge the upcoming NBC reality show called The Voice, but some of Christina Aguilera's friends are getting worried about her drinking.
They tell People magazine her recent public missteps -- from allegedly passing out at Oscar nominee Jeremy Renner's birthday party late last year, to her famed national anthem flub at the Super Bowl, to her drunken encounter with police this week -- can all be pinned on new boyfriend Matthew Rutler.
"There's a real concern about this guy," an unidentified "pal" tells People, "and a lot of [Aguilera's] friends feel she needs to get away from him."
The most recent incident -- when Rutler was arrested for DWI and Aguilera was left to sober up in the custody of Los Angeles cops -- is seen by the singer's friends as the biggest red flag of all.
"Hopefully, what happened is a real wake up call," a friend says.
The source tells People, Aguilera is "going out more and drinking more. She feels she is embracing her freedom and enjoying life...but now friends are hoping that she takes a step back and focuses on herself for a while."
Other friends apparently disagree, telling the magazine the singer just had a run of bad luck.
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