Lady Gaga, Justin Timberlake and Usher are among the celebrities that have joined the Digital Life Sacrifice. The entertainers plan to stay off social media sites like Facebook and Twitter on World AIDS Day (Wednesday), until the charity raises $1 million. 

The campaign was formed on behalf of Alicia Keys’ non-profit, “Keep a Child Alive.” Many celebrities have filmed "last tweet and testament" videos for the campaign, which will appear in ads showing them lying in coffins to represent their ‘digital deaths.’The foundation, which began in 2003, will accept donations through text messages and bar-code technology, which is featured in the charity's Buy Life campaign. The money raised will go to support families affected by HIV/AIDS in Africa and India.Keys is hoping more people — both famous folks and non-celebs — get involved once the new initiative launches.

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