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Forget blondes. Katy Perry is proving that it's blue-haired girls who have the most fun.

The singer, 27, has shown off several fun 'dos while hanging out in the City of Lights for Paris Fashion Week, including a '60s-inspired bouffant updo and a polished ballerina bun.

On Wednesday she arrived at the Miu Miu Fall 2012 presentation with a sleek, high ponytail. She paired the hairpiece (her real locks are chin-length) with pastel pink lipstick, shimmery aqua eyeshadow and bold brows.

Perry, who's known for her daring style, debuted the cobalt coif shortly after her 14-month marriage to Russell Brand ended with his Dec. 30 divorce filing.

"She wanted to go this particular color blue for a few weeks now. Katy is the ideal client because she loves to be creative and unpredictable with her look." the songstress' colorist Rita Hazan told Us Weekly back in January.