Britney Spears is seemingly ready for Christmas! The freshly minted 40-year-old showed off her dance moves to “Super Bad Pts. 1, 2, & 3” by James Brown in her latest Instagram video, posted to the platform on Thursday, Dec. 9. She looked incredible as she wore a sparkly silver one-shoulder gown that featured an ultra-high slit on the right side. The gown was adorned with festive feather details, tying into her crystal necklace.