Double Denim ... Yay or Nay?

Normally if you asked me, what do you think of double denim? I would say "Hell to the No". However, saying that, this outfit, sported by Kristin Cavallari, has opened my mind to the possibility. Kristin has pulled the outfit off with great ease and looks fantastic as usual. I particularly like it with the beige and black heels too. My initial thoughts are it would have to be a light stonewash only, dark denim would be too much. What are your thoughts?

Outfit Details: 1. Denim Shirt | 2. Jeans | 3. Shoes