I gotta find out her name, she's gorgeous...

There's an absolutely beautiful actress in this movie whose name I gotta find out. I can't remember her character's name (since in most cases they were so generic), but she's wearing this incredibly conservative attire for most of the time (strapped hair, blouse up her neck, huge glasses and all). Then she's given out a key to keep, and before you know it, she's killed in front of an audience while doing a dancing routine where she's "seducting" her killer in beautiful lingerie. This was, for me, the most gruesome killing scene of this movie, for I wasn't expecting this nerdy character to strip out her clothes, nor to get killed in front of all the play's crew, especially since she was so incredibly pretty and that she had the key that locked everybody in the scene, with a mad killer running loose! Thanks in advance if you have any info on her!