Well, ok, it's not an exact match this time, but, I've finally found something about the maxi dress she wore at the
Steven Scher Memorial Scholarship for Aspiring Restaurateurs Benefit 
It's a Michelle Jonas dress - who is most known for the Keyhole dress seen on some celebrities or the Hippie one seen on Angelina Jolie.
The dress on the left isn't exactly the same, but it's the only one I've found and which looks almost exactly like the one Lauren wore.
Here's the link to
Michelle Jonas website and shop on line for those who would like to travel in style (she makes really gorgeous dresses)
