It is my elder sister's wedding cake, a traditional fruitcake with fondant flowers and piped lacework.
Flowers are white roses, Australian alpine bluebells (Wahlenbergia) and Bouvardia. The theme was navy blue and silver (hence the navy blue ribbon under the piped lace and also the use of the Whalenbergia), and the piece of lace in the arrangement on the top tier is the same as that on my sister's dress :)
Difficulty: Ridiculously hard
Anyway, pics now. Enjoy!