Duo Halloween Costume: Romy and Michele From "Romy and Michele's High School Reunion" This is the best duo costume for those who want to stand out at their Halloween party. Bring a stack of Post-it notes to really stay in character. What to wear for Michele: An iridescent pink dress with feather trim. Must accessorise with a high half-ponytail, pink wedges, a pink clutch bag, and a choker. What to wear for Romy: A shiny blue minidress with silver heels. Image Source: Everett Collection