We love signature looks, but it's so much fun when a celeb switches up their style! At a recent event, Serena Williams debuted a brand-new, chocolate brown, sleeker-than-sleek style that had everyone in awe. She looked like a tennis-playing Cleopatra! What a fun, easy way to add oomph to your look -- simply ask your stylist for a deep brown or black rinse, add a few pieces and flaunt a center-parted, smooth blowout. We can't wait to see what the gorgeous athlete does next... Here's what you had to say: Queen commented via Facebook: "She looks different, but great!" Nikkie wrote via Facebook: "Love her new hairdo. She looks very beautiful."