Watch The Ellen DeGeneres Show Season 4 Episode 21 Online

Ellen hosts a special episode to kick off "Breast Cancer Awareness Month." Ellen, whose mother is a breast cancer survivor, is joined by musician and breast cancer survivor SHERYL CROW who shares some preventive tips with viewers. Plus, CHRISTINA APPLEGATE, whose mother is also a breast cancer survivor, stops by. Plus, four remarkable audience members donate their hair to Pantene's "Beautiful Lengths" to make wigs for women with cancer.