That classy Courtney was in the middle of a set at the Roxy on Sunset Boulevard Tuesday night when she turned to the ex-con heiress who was dancing by the side of the stage and flipped her the bird, British newspaper The Sun reports.

An eyewitness told the paper, "Paris was just dancing at the side of the stage to Celebrity Skin when Courtney stuck up a finger to her.

"No one really knows what the reason was.

"Paris burst into tears and left the gig early.

"I thought they were friends."

Poor Paris can't seem to catch a break since being released from jail after violating probation for a D.U.I. Victoria Beckham, the latest toast of Los Angeles recently responded to a comment by Paris that the two would be soul mates by exclaiming, "Over my dead body." And now THIS???

All is not completely awful in Paris' world as The Sun also reports that the heiress is busy working on her second album.

Paris is quoted on a website as saying, "I'm already working on my new record. I've been in meetings with Scott and we've been working on it.

"I've been working on it with Scott for a few weeks."

Pop diva's Beyonce and Christina Aguiliera are allegedly on board. We'll believe it when we hear it but if it's true, we hope the two treat Paris a little bit nicer than Courney and Victoria have.