Kim Kardashian was joined by her two sisters, Kourtney and Khloe, as well as Brittny Gastineau and Caroline D'Amore, at her b-day bash in Las Vegas this weekend. Unfortunately, her very long birthday dress concealed her possibly slimmed-down shape, but I'm sure that we'll be seeing her soon enough around town.

Which sister do you vote as the best-dressed of the three? Was it Kourtney (purple fringe, amazing cleavage), Khloe (mini dress), or Kim herself?