Justin Timberlake, Lady Gaga, Alicia Keys to Quit Twitter for Charity

Justin Timberlake, Lady Gaga and a slew of other celebrities have pledged to sign off social media platforms as part of an effort to raise $1 million for charity.

The stars are part of a new campaign called Digital Life Sacrifice that will benefit Alicia Keys' AIDS charity, Keep a Child Alive. The entertainers plan to sign off sites including Facebook and Twitter starting Wednesday, which is World AIDS Day, and will not sign back on until the charity raises $1 million.

Other celebrities taking part are Usher, Jennifer Hudson, Ryan Seacrest, Kim and Khloe Kardashian, Elijah Wood, Serena Williams, Janelle Monae and Keys' husband, Swizz Beatz.

For the campaign, the stars have filmed "last tweet and testament" videos and will appear in ads showing them lying in coffins to represent what the campaign calls their digital deaths.

"It's really important and super-cool to use mediums that we naturally are on," Keys told the Associated Press.

Keys said not one celebrity who was approached about the campaign said no. The move will likely make an impact in the social media world: Keys has 2.6 million Twitter followers, while Timberlake has 3.5 million and Gaga boasts more than 7.2 million.

Keys' organization, which began in 2003, plans to accept donations through text messages and bar-code technology; the donations will support families in Africa and India who are affected by HIV/AIDS.

The Associated Press contributed to this report.