But the design is so classic that it's super easy to find without resorting to dropping major cash for the Tom Ford original!
We found two equally affordable options that are super similar to Kate's dress.
Check 'em out ...AFTER THE JUMP!!!
The weekend started off alright on Saturday with Cheryl dressed in an ill-fitting Roberto Cavalli gown while Dannii looked like a Greek goddess in Carla Zampatti.
But Sunday? That's when shiz got inneresting.
The next night Chezza hit the stage in a gorgeous Editions by Georges Chakra and that poorly done hair bow a la Lady GaGa on her head.
Clearly, it's not working with that dress or for Cheryl. Ever.
Then there's Dannii, who chose to look like a blue leopard in that long-sleeve Emilia Wickstead dress.
Hopefully next week they'll make up for these fashion disasters.
[Images courtesy of HELLO.]