Christina Aguilera At Jeremy Renner's Party: Passes Out Drunk In His Bed

UPDATE: Renner's rep tells us Aguilera was "clearly enjoying herself but she was not in his bed."

PREVIOUSLY: Christina Aguilera may have had too much fun at Jeremy Renner's birthday party -- which made for a less than fun time for him.

Renner held a blowout bash for his 40th birthday in early January, invited stars Leonardo DiCaprio, Scarlett Johansson and Colin Farrell to help him celebrate. Aguilera was there, too -- and reportedly gave him a gift he didn't quite want.

Us Weekly reports that Aguilera was so drunk that she stumbled her way to Renner's bedroom, passing out on his bed, with her new boyfriend, Matthew Rutler, giving her a massage. That's when Renner walked in.

The magazine reports that Renner recounted the tale for friends at a Golden Globes after-party.

"Someone comes and tells me she's in my room," he told people. "I run up and open the door and I'm like, 'Um, hi. What are you doing?' She just starts slurring. Her boyfriend was rubbing her back. Who comes to someone's birthday party that they don't know and gets in their bed?! My parents were there!"

RadarOnline reported a similar story, saying that Aguilera was at one point being comforted by Rutler in a back room.

Recently, it was confirmed that Renner will appear in 'Thor' as Hawkeye, the Avengers character he'll play in the future comic book ensemble film.