Lynn McMasters has a wonderful pattern on her website, Lynnmcmasters.com . I would start with a wire-edge shaped buckram base shaped roughly like a heart. You can also do it with just millinery wire and chiffon - I've seen some lovely sheer ones but not sure on accuracy of those.
Sometimes I wonder how "normal" people survive when they have to be themselves, day after day after day. Is Halloween really enough of an escape?