Fiery supermodel Naomi Campbell has been embroiled in another assault wrangle after allegations she spat in the face of a security guard at a U2 concert in New York late last year (05). The 35-year-old was a guest of her ex-fiance, U2 bassist Adam Clayton at the Madison Square Garden gig when she also allegedly verbally attacked the bouncer, who asked her to get off a barrier separating the band and audience. A police witness tells the New York Daily News, "Campbell told him he was a f**king a**hole and spat in his face." Another source claims Campbell screamed, "Don't you know who I am!". The source adds, "She acted like the spoiled prima donna you read about." No police report was ever filed. The troubled catwalk queen already faces a possible seven years in jail for allegedly throwing a mobile phone at her assistant ANA SCOLAVINO's head last week (30MAR06). She denies the charge.