Britney Spears kicked off her brand new Femme Fatale tour last night in Sacramento -- and we've got shots of all the sizzling costumes she wore during the show!

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While we have no clue how her performance was (though reviews are positive), Spears looked great in a number of different sexy get-ups, including a Marilyn Monroe-inspired dress, studded short shorts and a golden bikini.

The show definitely looks like a spectacle, with Britney riding a motorcycle and giant guitar, giving a lap dance to one lucky fan and even rising up on a giant swing as an aerialist dangled below

Check out all the photos above -- and be sure to come back later, we'll be posting a couple videos from the concert!

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