By Leah Ornstein - Breaking Celebrity News Style & Beauty Editor

The Duchess of Cambridge was flying high on the fashion front on Thursday, boarding a plane to Canada in unusually expensive duds – and Breaking Celebrity News has all the details, as well as the price breakdown of her designer look.

Princess Kate, who usually rocks cheap and chic duds, showed off her famous figure in an RM by Roland Mouret Manon sheath dress (a favorite of Hollywood stars such as Penelope C