CHICAGO CAST WOULD LIKE TO "RUB" ASHLEE SIMPSON OUT

Her Chicago cast members are not too fond of Ashlee Simpson's Hollywood ways.

The Simpson family scion made her B'way debut at the Ambassador Theater in the revival of tuner Chicago and sources are saying she may have upset some of her fellow thesps when she sat in a "makeshift VIP section" at a show after-party.

"It's not like this is a club in L.A.," one cast member griped to the NY Daily News.

"She has to perform with us for two months."

But Ash seemed not to have a care in the world as Fall Out Boy hubby Pete Wentz, Big Pappa Joe and an even more curvaceous big sis Jessica were in attendance cheering and Tweet-ing her on and downing drinks at the Svedka post-curtain wrap up.