Us magazine.com is reporting that celebutante Paris Hilton is, well, jealous of fellow celebutante (and current reality TV personality) Kim Kardashian. Paris reportedly “flew into a rage” in Las Vegas at Lavo nightclub when Kim “ignored and publicly mocked” her frenemy.

It supposedly didn’t help when Paris learned that Kim had been flown in on a private jet.

“Paris got so mad!” a source tells Us. “She could not believe Kim got a jet and she didn’t. She used to get the jets.”

Later that night, the former Simple Life star — roundly ignored by other revelers — was “fuming” when Kardashian commanded attention from the crowd, a guest says.

Ouch. The source said Paris is having a hard time dealing with Kim’s increasing popularity.

“Paris is upset at Kim — but it’s 100 percent jealousy,” a source says of Hilton, who went to pre-school with Kardashian and took her to her first Hollywood parties. “Kim is not only doing what Paris did, she’s doing it better, and everyone loves her.”

Counters another source: “Kim should thank Paris. Paris gave her her career.”

The higher the rise, the farther the fall. Remember when Paris was everywhere? Things never seemed to be quite the same after she served time in jail, but I don’t know if all this is true.

What do you think: fact or fiction?

Photos by FAME