ET Online takes us behind the scenes Dakota Fanning films her “Stand Up to Cancer” public service announcement.

Don’t miss the star-studded, one-hour “Stand Up to Cancer” fundraising event September 10 when it’s simulcast live and commercial-free on all major networks– CBS, ABC, NBC, and FOX–as well as some cable stations.

For those of you who missed the final PSA video with Dakota Fanning & many other Hollywood stars, you can see it HERE!

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