I was on Netflix looking for "Evangelion" and Netflix directed me to DVDs starring Evangeline Lilly. One such DVD was "Freddy vs. Jason," which I assumed was some sort of silly mix up. After a search on something they call "google," it turns out the "Lost" star WAS in the ultimate monster mash. She was in the background of a single scene and had no dialogue, but she DID look pretty upset when that weird crazy kid scared everyone by describing Freddy.
With this new information, I think we should re-do "Freddy vs. Jason" (we did it on JFD19), as Mark will probably like FvJ more now. Mark loves "Lost," you see.