Today, Oprah kicked off breast cancer awareness month one day early, and had Christina Applegate on to discuss her breast cancer diagnosis and subsequent double mastectomy. Overall, it was a really educational show, because Applegate's oncologist was also a guest, discussing details - about mammograms, MRIs, and the breast cancer gene - that most of us are clueless about. But it wasn't just scientifically informative. Christina also talked about the mourning process she went through after having both of her breasts removed, and the way that it affects her day-to-day life, like how small things like the motion of brushing her teeth is different now, and how it's more difficult to carry her purse. Clip above.