Royal wedding fever is growing, as is speculation about what the future princess will wear for the big day. (See stylists' ideas for Kate Middleton's wedding hairstyle.) Nobody knows what Kate will wear for her first kiss as a princess, but at least one lip product is inspired by her nuptials. After launching No More Waity, Katie nail polish, Butter London is bringing out a gloss of the same name. The limited-edition shade, a sheer lavender with small flecks of lilac, is free of parabens, phthalates, sulfates, and petroleum-derived ingredients. Just in time for tax refunds, the gloss launches April 15 online and at Nordstrom — handsome prince not included.