Where the heck is the Powder Room?

I can't seem to find the powder room. The walkthrough says go back to the hallway and go into the powder room. I can't find it anywhere! Not even on the map. Where the heck is it!?!

the powder room is by the dressing room. It wont be on your map till u open the door. its by the princesses bedroom.

Hmmmmm. Princesses bedroom? Dressing room? Is her bedroom the one where you kill the bugs? There is a door I need a blue key to enter, but I haven't got a blue key. Did I miss something? Almost all of the rooms say completed. Maybe I need to read through the walkthrough. Thanks.

Went back to the walkthrough and I swer I was never in that hallway before! I found it and the bedroom.