Part of the fun of Mardi Gras is dressing up in bright, colourful fancy dress costumes. Mardi Gras themes are popular for parties, balls, parades and just for fun. Mardi Gras costumes can be as simple as a masquerade mask or feather boa. However, most costumes are designed to be more flamboyant and carnival themes are very popular and could include jester or clown. Popular choices for the women .