For some, Halloween is an opportunity to take on a new persona; for others, it's an opportunity to proudly let their true colors fly. Mediaite has combed celebrity sites, media soirees, and the viral web to assemble some of our favorite costumes of Halloween '09. In our travels, we've come across Heidi Klum dressed as a raven, Nick Douglas dressed as PostSecret, Jon Gosselin dressed as a shallow celebrity tabloid cover (!), and much, much more: (more...)