Naomi Campbell has a very good reason for hitting Art Basel in Miami with a bodyguard — she has a stalker.

After we reported that the supermodel was flanked by a burly security guard at a charity auction in South Beach, Campbell’s rep in London, Alan Edwards, called us to say that Campbell has had a problem with an aggressive female stalker while in Miami.

“She usually doesn’t travel with a bodyguard,” Edwards said. “But the police here actually recommended to her that she use one. She didn’t want to take any chances, especially after what happened to Gianni Versace,” referring to the designer who was shot and killed on the street in South Beach in 1997.

Page Six also reported that Campbell and an unidentified woman got into an argument at the W hotel at a party hosted by Vito Schnabel and Stavros Niarchos. Edwards says that woman was Campbell’s stalker, though he declined to offer any specifics as to her identity.

An eyewitness at the W tells Page Six: “Naomi and her people were talking to DJ Mike Nouveau when some crazy British girl came over, shoved Mike out of the way, and started screaming at her. She yelled, “How could you do that, you [expletive]! She was quickly dragged away. Naomi started walking in the opposite direction, and yelled back at her.”

Authorities in Miami wouldn’t say whether Campbell had formally filed a complaint.

Campbell, a notorious hothead in her own right, has had a busy Art Basel, making the rounds with boyfriend Vladislav Doronin, a Russian real-estate tycoon. She was spotted chatting up Jamie Foxx at art dealer Larry Gagosian‘s dinner at Mr. Chow on Wednesday, and had dinner with Nicky Hilton, Eva Chow and Stephen Dorff at real-estate developer Aby Rosen‘s dinner at Solea on Thursday.