Director Michael Bay was horrified when actress Scarlett Johansson insisted on going topless for a love scene in new movie The Island - because the romance is rated PG-13. The 20-year-old beauty called Bay to her trailer and angrily refused to wear an unflattering black bra for her love scene with co-star Ewan McGregor . But Bay had difficulty persuading Johansson not to do the scene naked. He tells movie magazine, "You know the situation - the famous director gets called to the actor's trailer before she does the love scene. I'm like, here we go. I'm ready to do Ewan and Scarlett's love scene. I'm like, 'Oh my God, she's not going to come out.' She says, 'I'm not f**king wearing this cheap-ass black bra, okay? I'm going naked.' I'm like, 'Scarlett, you can't go naked. It's a PG-13.' Classic story, She's feisty, I must say."