Decorate bodice. Use fondant roller with purple guide rings to roll out peach fondant 1/8 in. thick. Use knife to cut a strip, 4 in. long x 2 in. wide. Use decorating brush and piping gel to attach fondant around bodice strip. Cut shoulder strap 1/4 in. x 1 1/2 in. Use decorating brush and piping gel to attach shoulder strap to doll pick. Insert doll pick in top of cake.
For hair tie, use fondant trimmer and peach fondant to cut a strip, 1/4 in. by 1 3/4 in. Gather hair in a ponytail and tie with rubber band. Wrap fondant strip around rubber band.