What's the deal with Uggs?

We recently took some swank Parisian girls shopping in Soho. All they wanted was Uggs. Why? turns out they are about a 1/3 of the price as in Europe.  We understand the power of the Euro, but not why an Australian brand would be so much cheaper here. Nevertheless, upon reaching the store, we found it to be the busiest one in all of Soho and nearly out of stock.  Tip for the day. Buy them online!