Sound the alarm! Alicia Keys, Justin Timberlake, Lady Gaga, and Usher are killing off their Twitter accounts! The Headless Horseman of the Apocalypse are surely on their way!

Okay, the end of the world it is not, but these celebs are signing off of their accounts on Wednesday, December 1, which is World AIDS Day, for a good cause— Keys’ charity, Keep a Child Alive. This is part of the Digital Life Sacrifice campaign, which is asking celebrities with large social followings— Jennifer Hudson, Serena Williams, Elijah Wood, Ryan Seacrest, and Kim Kardashian, to name a few— to stay offline until the charity raises $1 million, through text messages and bar-code technology, to support families affected by HIV/AIDS in Africa and India.

In addition, these high profile faces have filmed “last tweet and testament” videos that will show them lying in coffins to represent what the campaign calls their “digital deaths.”

In an interview with the Associated Press, Keys, who has some 2.6 million Twitter followers, said, “It’s so important to shock you to the point of waking up.”

This campaign seems to involve quite a bit of legwork; recruiting these massive celebrities, having them film videos, and swear off tweets for days. While raising funds is one of the key goals, the greater effect here is awareness for the issue and organization; as Gaga has more than 7.2 million followers, and Timberlake 3.5 to his name.