"Create a vibrant illustration of the letter 'B' in a classic Disney style on a white background. Use a playful, rounded font for the letter, filled with Disney’s signature colors—blue, yellow, and red. Decorate the 'B' with Disney details: add Mickey Mouse ears on the top of one side, Goofy’s hat on the other, and small sparkling stars surrounding the letter. Add subtle touches, like a mini Cinderella's castle in the bottom curve of the 'B' and Tinkerbell sprinkling golden pixie dust along the side. Use bright colors and smooth outlines to make the design pop with Disney charm."