Duo Halloween Costume: Hansel and Derek From "Zoolander" Get your smize on and dress as rivals-turned-friends Hansel and Derek from "Zoolander" this Halloween. Definitely perfect your model walk if you go with this duo costume. What to wear for Hansel: Tight python trousers with an open patterned shirt. Finish it off with a shaggy blond wig and fake tattoos on your chest. What to wear for Derek: Tight red leather trousers and a red button-down. Gel your hair straight up. Image Source: Everett Collection