Duo Halloween Costume: Dionne and Cher From "Clueless" "As if" things could possibly get more iconic than this duo Halloween costume idea. Break out the plaid and knee-high socks to be best friends Cher and Dionne from "Clueless". What to wear for Dionne: A black-and-white plaid blazer and miniskirt with a stylish hat will turn you into this '90s style queen. The nose ring is optional. What to wear for Cher: A yellow plaid two-piece blazer and miniskirt set, white knee-high socks, and black shoes are all you need. Image Source: Everett Collection