A fund-raiser for cancer research features reports by Brian Williams, Charles Gibson and Katie Couric. Appearing: Lance Armstrong; Christina Applegate; Elizabeth Edwards; Robin Roberts; Jennifer Aniston; Charlize Theron; Meryl Streep; Forest Whitaker; America Ferrera; Salma Hayek; David Cook; Dana Delany; Abigail Breslin; Scarlett Johansson; Masi Oka; and Marge and Homer Simpson. Included: Delany undergoes a mammogram; Couric and Breslin visit patients at Children's Hospital of Philadelphia.