New York, Nov 16 Paris Hilton is reportedly fuming that her former best friends, the Kardashian sisters, have eclipsed her in the fame and money stakes.

The hotel heiress apparently can't digest the fact that Kim and her siblings, who got their first big break by hanging out on the Hollywood scene with Hilton, are becoming more famous and earning more cash than she does.

According to sources, the socialite is now declaring war on the sisters.

Hilton is planning to boost her brand by pushing a new beauty line and make herself more likable by playing down her lavish lifestyle.

"Paris is furious that Kim got her start by hanging out in Hollywood with her-and now, the Kardashians have it all, the reality shows, the magazine covers, the big appearance fees and promotional deals," the New York Post quoted a source as saying.

"She used to command 100,000 dollars for club appearances, but now Kim is the hottest girl-and they aren't friends anymore. The magazines are bidding around 300,000 dollars for Kourtney's baby-shower and baby pictures. And Khloe's wedding brought in record ratings for E!

"Paris has realized that standing for excess in a recession doesn't appeal. The Kardashian girls seem more real, and girls identify with them more. She's got to ditch the pink Bentley and concentrate on developing herself," the source added.

Sources also say that Hilton is carefully working on the launch of her new hair and beauty line which she'll unveil in Beverly Hills on Tuesday.

And she's keen to play up her more stable relationship with Doug Reinhardt and talk about the possibility of marriage and babies.

"Paris has 15 product lines on sale. She isn't really a party girl anymore, she is quite settled with Doug. She wants more people to appreciate that she's grown up," the source said. (ANI)