Twiggy may no longer scream mod queen, but circa 1960s, she was highly popular for her high-fashion mod look. If you're looking to mimic someone with a bold, youthful signature style this Halloween, Twiggy is your girl. Inspired by the mod creations of English fashion designer Mary Quant, the supermodel wore everything from mini skirts to shift dresses, go-go boots to funky print dresses, sequins to plaid. Twiggy, whose real name is Lesley Hornby, wasn't merely known for her stick skinny body (hence the childhood nickname) and quirky fashion sense; she also spearheaded the application of fake lashes under bottom lashes and the androgynous pixie haircut. Groovy.