jeremyrennerxtina.jpg

Christina Aguilera allegedly crashed Jeremy Renner's 40th birthday party on January 8, and Us Weekly reports that the singer got so "wasted", she had to pass out on his bed for a bit!

Renner reportedly went on a rant about the incident at In Style's Golden Globe party, telling pals, "Someone comes and tells me she's in my room. 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!"

Another source added, "Christina was a mess at that party. She acted like a fool. Her boyfriend was shushing her and telling her to go to sleep." Yikes!