Alicia Keys Stars including Katie Holmes and Usher are throwing their support behind Alicia Keys� Keep A Child Alive foundation by modelling a new range of t-shirts for the charity. Pregnant singer Keys and her new husband Swizz Beatz are also seen wearing the shirts, which feature a barcode and the slogan �Buy Life�. Fans can download an application onto a cellphone and �scan� the barcode to make a donation to the cause. Kim Kardashian, Ryan Seacrest and Jay Sean are also part of the campaign and Keys is convinced the initiative will make a real difference to families affected by HIV/AIDS in Africa and India. She says,