Paris Hilton was caught knocking back Grey Goose cocktails and locking lips with a blonde at Hollywood ’s Les Deux Nightclub on January 9th.

“They were really getting into it, but Paris was just messing around and having fun,” a snitch tells Star. Paris may have had fun, but she landed her pal her hot water with her BF.

“She ended up getting into an argument with her boyfriend over the kiss with her Paris.”