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this was her most risque outfit Number one: The brunette beauty - and Cover Girl model - had men wearing surf boards for her California Girls performance Beach party: The star's outfit was reminiscent of a colorful beach ball, while her back-up dancers were rocking retro swimwear Poptastic: The fun-filled performance was classic Katy - kitch, girly and full of energy Surf's up: The beach scene featured waves and aquatic creatures as well as Katy and her crew Every last detail: Even the Part Of Me hit-maker's microphone boasted a multicoloured design Watch where you're going: Some of Katy's dancers got a little confused without any eye holes in their costumes Going viral: People on Twitter were talking about one of the sharks forgetting his moves Flirty and fun: The singer's sweetheart neckline dress flattered her petite frame And as she geared up for her halftime performance at football's biggest game, Katy Perry went down memory lane posting a throwback photo from her childhood days on her Twitter account on Sunday