Serena Williams turned her day of baking into a theme party when she slipped into an old Snow White dress on Wednesday. The only problem? It didn't fit. The 38-year-old tennis champ opted for the teeny tiny dress instead of an apron while in the kitchen and thankfully, documented the whole experience for her 12.3 million Instagram followers. Sporting the black, yellow and red classic dress with her curly locks back in a ponytail, Serena Williams sang her way through the bake session before showing herself literally bursting out of the dress that was too small.