I need your help! I have been asked to do a wedding cake like this one: (check it out)
http://www.weddingandcakes.com/heart-shaped-tierd-wedding-cakes-2/
it's the black one with an upside-down heart stacked on another heart, with a 3rd heart setting on a plate. How in the heck is this done? Is it done with heart-shaped pans, then covered? Or is it sculpted? How can I do this without the cakes crumbling over and falling apart???

Looks like it is fondant covering the cakes, so that will help. Bake a firmer cake - ie pound cake - and use lots of support. Good luck!

I have done this. Not heart shaped, round. I used a firm cake or a pound cake. cover both sides with fondant. It works like a wrapper. let sit until it is firm. I had no problem. I did put a sharpened wooden dowel down thru the cake. It went all the way thru to the cake drum.