To make streamers, roll out fondant 1/8 in. thick. Cut into thin strips in lengths from 3 to 5 in. long; wrap loosely around lollipop stick. Let set 15-20 minutes then slide off and attach to cake with buttercream.For confetti, dip tip 12 in cornstarch; cut dots and attach to cake with damp brush.For bottom border, roll 3/4 in. balls of fondant in various colors; attach with buttercream. Pipe tip 4 buttercream message.