Singer Willow and her Karate Kid brother Jaden Smith are the latest celebrities to model T-shirts for the new Keep a Child Alive (KCA) fund-raising campaign titled “Buy Life,” The Boombox reports. The superstar siblings—children of Will Smith and Jada Pinkett Smith—join KCA founder Alicia Keys and other celebrities to promote sales of the tees. The shirts have a bar code emblazoned on them. By scanning it with a camera phone, people can donate $10 to the HIV/AIDS charity or text “BUYLIFE” to 90999.

To read the Boombox article, click here.