JENNY’s EGO IGNITES KRISTIN’s JEALOUSY

NationalEnquirer.com

Catfight brewing between football-loving BFFs JENNY McCARTHY and KRISTIN CAVALLARI!

“Playboy” pinup Jenny’s hot and heavy with Chicago Bears linebacker Brian Urlacher after they were introduced by mom-to-be Kristin, who’s engaged to Brian’s best bud, Bears quarterback Jay Cutler.

But the two ladies may soon need a referee to iron out their differences, says a source.

“Jenny’s finally found love with a good man and she owes it all to Kristin, but their once-warm friendship has suddenly turned as cold as a Chicago winter,” the source told The ENQUIRER. “For a while, they were all smiles showing off their football studs and making plans to get together for dinners and holidays. But that’s all changed, and jealousy and ego are to blame.

“Kristin enjoyed being the famous fiancée of local hero Jay until Jenny and her huge personality started taking center stage. Now she’s finding Jenny’s loud and over-the-top antics a bit obnoxious.

“Meanwhile, Jenny thinks Kristin is just jeal­ous because she’s pregnant and getting huge while Jenny is posing naked for ‘Playboy.’ It’s mean girls’ cattiness at its worst.”

Chicago native Jenny, 39, now hosts NBC’s “Love in the Wild” and recently doffed her duds for “Playboy” for the sixth time (right). The sexy blonde has a 10-year-old son with ex-husband John Asher, and her beau Brian, 34, has three chil­dren from a previous marriage and a relation­ship.

As The ENQUIRER has reported, former MTV star Kristin, 25, and 29-year-old Jay – who are expecting their first child, a boy, in late summer – played matchmaker for Jenny and Brian.

“With a baby on the way and a wedding to plan, Kristin has bigger things to worry about than Jenny,” added the source.

“And Jenny is busy trying to become one of Chicago’s power couples. Although their friendship may be on the rocks,