6. Alison Lohman - Dragonfly
Not only did she waste time on the Kevin Costner flick but she even wasted a haircut. Alison Lohman played a cancer patient and shaved her head and eyebrows for the role meaning that she wore wigs throughout her next film White Oleandor. The actress only found she wasnt in the film when she saw it at the cinema. The only good thing to come from the experience, says Lohman in a 2009 interview, was the donation of hair to a cancer foundation so they could use it for wigs.