Slumber Party Massacre III

**_By-the-numbers third instalment lacks the imagination of the previous one_** Five teen girls hold a slumber party when the parents of one of them are out of town. As several guys crash the party someone with a huge drill and murderous intent also invades the proceedings. "Slumber Party Mass…

Which one was this? I can't really remember. I do, however, know it was the movie where they hire a lot of women and require them all to take their clothes off. I recall a shower scene in there somewhere. And then I remember the women running around screaming in undies that are really only wor…