This annual TV fundraising marathon occupies only an hour of TV time, yet it’s spread across more than 25 different television networks, including the four major broadcast networks – ABC, CBS, NBC and Fox – as well as such outlets as ABC Family, Bravo, E!, Encore, FXM, HBO, Lifetime Movie Network, MLB, National Geographic, Showtime, Starz!, TNT and VH1. Katie Couric hosts, and scheduled performers for this live showcase include The Who, and celebrity appearances are virtually nonstop.