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Remember the Baby Shark Challenge [2]? How could you forget, right? Well, Ciara recently decided to put a sexy spin on it, and her legs were literally burning from it. On Wednesday, the 33-year-old singer showed off her smooth moves [3] while dancing in a pool in a black one-piece. "My legs burn so bad," Ciara says at the end of the video. Based on how quick she switches things up to the beat of the music, it's almost as if she's memorized the song by now, which is highly possible given the fact that she's a mom [4] to 2-year-old Sienna and 5-year-old Future Jr. Get it, Mama Shark!