Unknown Rosa Clara

I am so frustrated because I am unable to find this amazing tiered gown!

I originally spotted it in the cake picture below on a Brides slideshow.  When I read that is is by Rosa Clara I quickly clicked on over to find it but alas I can't find it in any of their 2012 collections.  Perhaps it is a 2013 collection gown?  I hope so!

Credit: Brides.

The only picture I was able to find was this one, modeled by actress Mischa Barton (I guess she is now modeling?)  Unfortunately it has no reference to they style number/name of the gown or which collection (2012 or 2013) it belongs to.  I guess I will just have to wait and see!

Credits: Rosa Clara, worn by Mischa Barton.