AceShowbiz -

This one is Hot. Trust me. It's really really HOT. Paris Hilton and Stavros Niarchos split. The has just-on couple reportedly split after a late night pillow fight at Kelly Osbourne's 21st birthday bash at the Hard Rock Hotel in Las Vegas.

Reports on the incident different from one to other sources. To be objective it is said that Stavros caused thousands of dollars worth of damage to the hotel, throwing tables, breaking a sprinkler head and setting off flooding, fire alarms, and evacuations. There was also a pillow fight involved.

An onlooker said, "The carpet was coated with pillow feathers. Every lamp was broken. A maid told us they ruined every pillow in the room." The incident obviously made Paris mad and was overheard saying to her boy-friend: "I don't want Hard Rock to think I bring in people who do this."

About their split, a friend of Stavros revealed to Star magazine: "They broke up Nov. 13. Stavros told Paris that things are out of control and he's through with the drama. He said to her, 'I need time to reflect. I should have been home today studying, instead I am here paying $100,000 worth of bills.'" Hot isn't it?!