Welcome to the dark side, Britney Spears! Over the weekend, the pop princess shared a picture of her new brunette strands (as well as her remixed fragrance duo) on Instagram, just before prepping for her Las Vegas show. Could going darker be an annual event for Spears? Possibly! She tried out a rich chestnut tone almost a year ago, and eventually returned to her trademark platinum hue. Britney isn't the only one making the switch from blonde to brunette -- she joins Kim Kardashian, and Selma Blair, who DIY-ed her color and revealed the results on Twitter. Do you prefer Britney as a brunette, or a blonde? Tell us in the comments! Then, get inspired by clicking through more celebrity hair makeovers in our gallery.