Britney's Concert Costumes

Go under the big top to see Spears's spectacular – and super sexy! – Circus looks. By Serena Kappes and Aaron Parsley

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SHE'S GOT THE BEAT

Britney Spears is back! The pop star kicks off her 32-city Circus tour Tuesday at the New Orleans Arena in Louisiana, where she thrilled fans for more than 90 minutes in a show that ended with her hit "Womanizer," performed in a sexy cop getup.