Actress Debi Mazar has opened up about the ups and downs of her friendship with Madonna, accusing her longtime pal of once trying to steal her boyfriend. The Entourage star befriended the singer before either one had found fame, and Mazar reveals their relationship has been blighted by "many" fights and arguments. During an appearance on Andy Cohen's Watch What Happens: Live show, the TV host asked Mazar a series of quick-fire questions about the pop superstar, and demanded to know whether Madonna had ever tried to steal one of her former flames. Mazar explained, "Yes, yes. Randy. He was a Puerto Rican graffiti artist. She tried, she tried (to steal him), but it didn't happen. He's married with kids now, thank God." Mazar also claimed "Sean" was the Holiday hitmaker's true love, but would only answer "maybe" when pressed as to whether she was naming actor Sean Penn. Madonna's marriage to Penn ended in 1989 after four years.