Modeling Career

So, while trying to go for the 'picture perfect' modeling career, I noticed that you have to get the heirloom via the Sweet Treat Challenge, that the heirloom is not offered as the grand prize, so where am I supposed to get this heirloom from?  I went through the whole sweet treat challenge and wasn't offered the heirloom as the grand prize.  What am I missing?  Any and all help would be greatly appreciated.