Either Christina Aguilera loves to have a good mom's night out once in awhile or she's been hitting the bottle a little too often lately. A new report suggests the chart topper might have been more than a little tipsy at Seth MacFarlane's annual Christmas bash in Beverly Hills on Monday night.

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According to Page Six on Tuesday, the blonde beauty supposedly refused to get into the holiday spirit at first and almost fell into a Christmas tree with her sky-high custom heels on.

What's more, while MacFarlane usually likes to make it a tradition of asking celebrities to come up on stage to sing a duet with him, Aguilera refused. Fortunately, though, other stars such as Meghan Trainor, Katharine McPhee and Bill Maher all got into the spirit and got up stage to sing with the comedian.

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But it looks like there is a good reason why Aguilera refused to participate in the festivities: she was allegedly drunk.

A source told the site, "Seth asked her five times to come up [and sing] and she refused. She was a mess. The reason she didn't get up is because she was wasted."

The insider added, "[Aguilera's] man [Matt Rutler] and her girlfriend had to hold her on each arm walking out. She was wearing 6-inch custom Louboutins. She was literally wobbling and she nearly fell into a Christmas tree before she and her boyfriend were spotted cozying up on a couch earlier."

Back in 2011 Aguilera was arrested in Los Angeles on suspicion of public intoxication and also reportedly passed out at actor Jeremy Renner's estate.

Tags: Christina Aguilera