Pop singer/actress Hilary Duff has criticised Hollywood casting executives for having "no imagination". The Lizzie MCGuire star insists she hates her "mainstream" tag, and would love to land more challenging acting roles - but insists it's the fault of movie bosses who can't see past her "teen star" image. She says, "They'll meet with me. They'll want to go somewhere and talk, ask questions. Then they'll call and say, 'We really love her, she's great, wow.' "But they have no imagination. I know people look at me and think I'm just so mainstream, 'She's just a blonde, young girl.' But I want to be really artistic."