How Do I Get My Roommate To Take A Shower?

Haha no, seriously.

We're roommates in a dorm at college. I shower everyday...she on the other hand...not so much. The last time showered was probably 3-4 days ago at best. She's a bigger girl and has bad body odor and at the end of the day when she takes her socks and shoes off...I won't get into detail. Her hair smells too because she doesn't wash it herself, she gets it done at a salon- she was supposed to go two weeks ago but that never happened. The few swipes of deodorant she uses in the morning don't last throughout the day and she continually wears the same pants, shirts, and even socks several times without washing them. She is my friend so I don't want to be rude about it, I need some advice on how to subtly tell her to shower or hint at the fact that she needs to everyday. No this is not a joke, despite what you may be thinking. Thanks!