Today, KATIE COURIC, CHARLIE GIBSON and BRIAN WILLIAMS announced a cancer fund-raising TV special so big that all three TV networks are getting behind it, as well as an army of celebs.

At 8 p.m. on Sept. 5th, NBC, ABC and CBS are simultaneously donating an entire hour to "Stand Up to Cancer," a telethon featuring performances by legendary recording artists and stars from film and television. LANCE ARMSTRONG,  MORGAN FREEMAN, TOBEY MAGUIRE and KEANU REEVES are just a few of the celebs appearing in the public service announcements.

Stand Up to Cancer was founded by the Entertainment Industry Foundation, a non-profit group of media, entertainment and philanthropic leaders. For more information, visit www.standup2cancer.org.