Friend is bugging me to death about this stupid jewelry party?

One of my friends has decided to start being a sales rep for Premier Designs Jewelry. She starts in January. She won't get off my back about it though. I think their jewelry is overpriced junk (she'll make 50% profit on each sale!). My apartment is tiny (but she offered to let me use hers). And I went to one of her parties & it was boring as junk. How can I get her to leave me alone about it? She won't take no for an answer!