Angelina Jolie's Red Carpet Transformation: Understated sexy at its best: silk blouse and leather pencil skirt. This killer combo was 100 percent Angelina at the New York Film Critics Circle Awards in January
Maybe something like this to combine a 'fairy' skirt and a tool belt. Pick out some complimentary colors and start ripping, sewing, using office brads or even gluing. There is no wrong way to make a costume.