All you have to do to enter is to leave a comment, and tell me where you would place your MonstEYErz keychains. Easy-peasy... The winner will be chosen at random (via random.org), and announced on September 15th.
1. There's no purchase neccessary to enter.
2. The prize will be shipped first class mail (or ground for international) to the winner.
3. You are responsible for any taxes or fees that may arise upon receiving this prize.