Heidi Klum is really into Halloween and this year, she’s opening the doors for you to get in on the action—and into her famed Halloween party in Los Angeles. And the best part is, it’s pretty simple. Become a fan of Modelinia on Facebook, upload a shot of your best Halloween costume, and get your friends to “Like” it. The person with the most thumbs-up wins two tickets to the spookiest, most star-studded Halloween soiree in Hollywood. But the contest ends on Sunday, October 25th so get facebooking now!

Check out our favorite celebrity Halloween costumes.

—Hannah Morrill