JESSICA SIMPSON has hit out at fans of American football team the Dallas Cowboys, for dubbing her a bad luck charm. Devotees of the Texas team turned on Simpson after her quarterback boyfriend Tony Romo under performed during games when she was watching in the stands. But Simpson insists she had nothing to do with the team's bad performances, telling Glamour magazine, "I don't know - other than me wearing my man's jersey and cheering him on. And him not playing the way he would've hoped and all of a sudden I'm to blame. "That was ludicrous. I don't understand why they think that I would be a distraction to Tony. Do they really think he can see way far up in that box? No. He's the most focused person I've ever dated."