PHOTO: Renée Zellweger Backstage at Cancer Benefit

Renee Zellweger

Rick Rowell/ABC

updated 09/10/2010 AT 4:25 PM ET

originally published 09/10/2010 AT 4:30 PM ET

Renée Zellweger, who had her own cancer scare, gets ready in L.A. for Friday’s Stand Up to Cancer show, signing a wall honoring friends and family lost to the disease.

The one-hour, commercial-free telecast airs at 8 p.m. EST on ABC, CBS, FOX, NBC, Discovery Health, E!, G4, HBO, HBO Latino, MLB Network, Showtime, The Style Network and TV One, along with more than 30 online streaming partners including AOL, Yahoo! and YouTube. – Sara Hammel


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