Report: Christina Aguilera Passes Out at Jeremy Renner's BirthdayChristina Aguilera may be one 'Beautiful' singer, but at a recent party, her behavior was anything but.

According to Us Weekly, the songstress over-imbibed at 'The Hurt Locker' star Jeremy Renner's 40th birthday party and gave him a rather unwelcome surprise.

When Renner, who was hosting a number of celebrity guests as well as family members, went upstairs to his bedroom, he found the 'Burlesque' star taking a load off in his bed.

According to a source, Renner regaled friends at the Golden Globes with the story, saying, "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!"