Stewart Rahr, a pharmaceutical billionaire, must have really been jonesing for a Lady Gaga tweet.

The mogul donated a whopping $500,000 to assist in AIDS research, thus ending the social networking ban many celebs took in order to raise money.

The Digital Death campaign has managed to get a lot of attention since it started on December 1 ... and from the right people, it seems. Alicia Keys, Kim Kardashian and Elijah Wood were among the stars who digitally died for the cause.

Meanwhile, we're still alive and kicking on Twitter, so follow us for all the latest celebrity gossip.