HIGH SCHOOL MUSICAL star Zac Efron is convinced his singing and dancing skills are useless - as they fail to impress the opposite sex. The 20-year-old - who is dating his co-star Vanessa Hudgens - was never successful when he tried to woo women with his musical talents. So the actor has been forced to resort to more conventional methods of flirting. He says, "It doesn't work (singing and dancing). I've tried. Conversation always works best. There's probably only one instance I can think of when singing to a girl worked for me. "As for dancing, you can't really go up to a girl and bust in on a cool dance move. It just doesn't work. I've tried that, too. It's not that cool."