Getty Images for GQ

Kim wasn't the only Kardashian to turn heads in a skimpy and sparkly dress -- her younger sisters Kylie, 17, Kendall, 19, and Khloe, 30, all wowed at the GQ and Giorgio Armani Grammys after-party on Sunday night. And that booty pose? Seems like it comes a little too naturally for Kylie!

Khloe brought on-again/off-again boyfriend French Montana as her date, and Kylie was joined by her much older beau Tyga. No date for Kendall!?

The bash was held at the Hollywood Athletic Club, and other stars at the bash included Calvin Harris and his new lady love, along with Rita Ora -- hopefully those two didn't bump into one another!