Many celebrities, including Justin Timberlake, Lady Gaga, Usher, Jennifer Hudson, Ryan Seacrest, Kim and Khloe Kardashian, Elijah Wood, Serena Williams, Janelle Monae and Swizz Beatz are getting ready for a new campaign called “Digital Life Sacrifice,” which will benefit Alicia Keys’ AIDS charity, “Keep a Child Alive.” The charity organization was started in 2003 in order to support people in Africa and India who are affected by HIV/AIDS.

This is how this works. They will sign off social media sites, such as Facebook and Twitter starting Wednesday, which is World AIDS Day. And, they will not come back until the charity campaign raises $1 million.

Alicia Keys told the Associated Press, “It’s really important and super-cool to use mediums that we naturally are on.”

Third-seeded Venus Williams, a 2002 finalist at the French Open, was upset on Friday by no. 29 seed Agnes Szavay 6-0, 6-4 at Roland Garros on Friday. Sister Serena Williams is set to meet unseeded Maria Jose Martinez Sanchez in the third round tomorrow, and the pair are still in the doubles field at the grand slam tournament.

On the men’s side, no. 1 seed Rafael Nadal made his way into the Round of 16 with a 6-1, 6-3, 6-1 win over Lleyton Hewitt and extended his clay court win streak to 30 matches. No. 2 seed Roger Federer is set to play no. 32 seed Paul-Henri Mathieu for a spot in the quarterfinals, while no. 6 seed Andy Roddick made the third round for the first time in eight years with a 6-2, 6-2, 7-6 (2) win over 85th-ranked Ivo Minar.