Paris Hilton went to Guy's club last night for some karaoke that also included a make-out session with Cisco Adler.
Mischa Barton broke up with him shortly after a nude pic of the rocker was found in Hilton's belongings.
According to a TMZ spy:
Paris Hilton and Mischa Barton's grungy ex-boyfriend kissing all over each other at the club last night, with Paris going so far as to give Adler a little lap dance.
When she wasn't getting randy in the crowd, Paris graced the stage with a rendition of "Bette Davis Eyes," followed by a medley of her hit "Stars are Blind."
No wonder why Mischa dumped him.