I'm confused!

Last week I went to use my curling iron. I've had it for about 5 years and it's never had any problems. I plugged it in in the bathroom and it wouldn't work. But I had just used the plug in with my blowdrier so it couldn't be a problem with the plug in (my straight iron also worked in the plug in). Just for interest sake I took my curling iron and plugged it in in the hallway and it worked. I tried it in the bedroom and it worked, and even in the bedroom bathroom it worked! So I am quite confused as to why it won't work in the other bathroom. Everything else that I have plugged in in there works, but just not the curling iron. Hmmmm...