At least 2-3 days in advance: Make fondant hearts. Knead 2 teaspoons of Gum-Tex into 24 oz. of fondant. Roll out fondant 1/8 in. thick. Using 2 1/2 in. nesting cutter, cut 40 to 50 large hearts; using 1 3/4 in. nesting cutter, cut 50 to 60 small hearts. Make extras to allow for breakage and let dry on cornstarch-dusted board for 2 days. Using royal icing, pipe tip 3 outlines with curls on hearts; let dry. Attach lollipop stick to back of each heart and to Anniversary Pick with royal icing; set aside.
Ice tops of 2-layer cakes in white and sides in yellow; prepare for
Separator Plate and Pillar Construction. To make swags, roll out fondant 1/8 in. thick. Imprint spiral design using Pattern Roller. Cut out circle using largest round cutter; cut swag 1 in. above bottom of circle using largest round cutter. Repeat to make 19 swags. Attach 8 swags to 10 in. cake, 6 swags to 8 in. cake and 5 swags to 6 in. cake with buttercream. Cut a fondant circle for each swag point using large end of tip 4; attach with royal icing. Pipe tip 4 bead bottom borders on all cakes.
At reception: Assemble cakes. Insert fondant hearts and Anniversary Pick. Attach ribbon around base with double-stick tape.