*Alicia Keys helped raise $2.4 million for AIDS treatment at her 8th annual Black Ball benefit, which was held at the New York Hammerstein Ballroom.

In attendance was Whitney Houston, Jennifer Hudson, Beyonce, Usher, Janelle Monae, and Jay-Z.

Keys was the evening’s host and also performed alongside Sade, “Love is Stronger Than Pride.”

“It was the most difficult things I ever had to do in my life, to try to pick one song,” she said afterward in an interview. “I lost sleep over it actually.”

For the past several years, Keys has been working to raise money to support the needs of HIV/AIDS patients. She recently launched the “Buy Life” campaign which features photos of celebrities wearing a t-shirt with a barcode, by which the public can donate to the organization simply by using their cell phones to scan the barcode from the site. All contributions will help to purchase medicine, the essential nutrition, shelter and education to help ensure that medicine is taken properly and effectively. For more information or to donate visit BuyLife.org.