updated 11/29/2010 AT 7:00 AM ET
•originally published 11/29/2010 AT 8:30 AM ET
Don’t worry, Kim Kardashian is not really dead. But starting Wednesday, she won’t be quite as lively on social media.
Kardashian, 30, is joining sister Khloe, Lady Gaga, Justin Timberlake, Alicia Keys and other stars in signing off Facebook and Twitter beginning Wednesday, which is World AIDS Day, to draw attention to the disease.
The campaign, called Digital Life Sacrifice, includes ads that show Kardashian and others lying in coffins to symbolize their digital deaths. They will sign back on when the Keep a Child Alive charity – which Keys has been closely involved with – raises $1 million.