Bake and cool cake in jelly roll pan. Cut mini cakes using largest heart cutter. Cover cakes with quick-pour fondant icing let set. Tint portions of rolled fondant rose and red. For stripes, roll out rose fondant 1/8 in. thick; cut into 1/4 in. wide strips. Position strips 1/4 in. apart on cake top; trim ends to fit and attach with damp brush. For cake top heart, roll out red fondant 1/8 in. thick. Cut heart using smallest cutter; attach with damp brush. In buttercream, pipe tip 3 bead hearts on cake sides, approximately 3/4 in. apart.