Aria - what about something like this without the ladybug sitting on top. You could incorporate some flowers to match your cupcake toppers, and a few little ladybugs, maybe some butterflies and such as decorations. Ladybug Cake
by Bron's Cakes
, on Flickr
Winterbaby - yes make three or however many layers you want and then just join them together using either ganache or icing. Just be aware that the higher it is the harder it is to ensure that it remains straight (if you were trying to get the cake to be higher than say 6 inches then you might want to put some spaghetti through all the layers to ensure that they do not move sideways).
Tanya - looks gorgeous