Decorate cake. Move cake to foil-covered cake board. Insert doll topper back into cake; smoothing icing around waist. Place white jimmies in a small bowl; sprinkle with Pearl Dust. Lightly toss and swirl to coat. Repeat in separate bowl with white Sugar Pearls.
Prepare 12 in. disposable decorating bag with tip 1 and white icing. Pipe 3 to 5-petal flowers and leaves around bottom of dress, arranging in clusters of 3 to 5 flowers. Repeat on bodice, bringing flowers and leaves down to a point on the front and sides of the dress, and extending the flowers 3 in. down the back of the dress. Reserve remaining icing in bag for later step.
Using tweezers, randomly position jimmies and pearls between flower clusters on bottom, top and bodice of dress.
Using reserved icing in tip 1 bag, pipe small line around neck of doll topper. Using tweezers, add Sugar Pearls to make necklace.