Who's Your Favorite October Cover Girl?

Check out the poll in the left sidebar and vote for your favorite October cover look! For your consideration we have:Ziyi Zhang in Harper's Bazaar ChinaKeira Knightley in AllureMary-Kate Olsen in Harper's Bazaar USCharlize Theron in VogueNicole Kidman in Vanity FairKatherine Heigl in InStyleTake a look and vote for your favorite! Final results will be posted in a few days.