Sibling rivalry is alive and well. Just look at the Kardashians. As much as the sisters love each other, anyone who watches Keeping Up With the Kardashians will know that when it comes to looking good, each sister wants to be number one. So when you get them all in one NYC room signing copies Kardashian Konfidential, it's hard not to compare, no? Big sister Kourtney wore her hair back in a fancy braided up 'do that was seriously rockabilly quiff-y up front. Kim wore her hair in a simple and sleek pony, with a little teasing around the front. Khloe's overall look was less polished than Kim's. She parted her hair in the middle, pulled it back into a messy chignon at the nape of the neck and had a few flyaways. What say you: do you like Kourtney's adventurous look, Kim's classic styling or Khloe's chillaxed vibe best?