Naomi Campbell's mystery feud with her pal

EMBATTLED supermodel Naomi Campbell is feuding with her old pal, Sean "Puffy" Combs. The two - who until recently would travel the world together and party till dawn - are not talking after Campbell unexpectedly pulled out of the new NBC show Combs is producing, "Cooking Showdown," which pairs celebrities with superchefs. "Naomi found out Puff was the producer and dropped out," said our spy.

Combs, who will have to do with just Ja Rule on his show, is mystified as to why she's so mad at him. A rep for Campbell didn't return calls while Combs' rep declined to comment. Meanwhile, we hear Campbell will sit down with Oprah Winfrey to talk about her anger-management issues.