While these fierce Ariella boots aren't new by any means, I just happened to glimpse a photo of Rachel Bilson out and about in LA yesterday, and did a double take at these Louboutins which, I think, definitely up the hotness quotient of her outfit!

Seen on everyone from the Olsen twins to Beyonce to sometime Pussycat Doll Nicole Scherzinger, the Ariella boot has a killer 12cm heel and has proven so popular they're sadly all sold out on net-a-porter.com.

But we can look at the page and dream can't we? (Or if you can live without the studs, Saks still have the suede version for $890.)