Jessica Alba and Alicia Keys are asking Americans to save their pennies to help save a child's life. The actress and the singer are just two celebrities involved in the 'Good Cents Initiative'- a campaign by US AIDS charity 'Keep a Child Alive.' Somalian-born model Iman also appears in the series of adverts, which are featured in glossy magazines throughout America. So does Zoe Kravitz, the 19-year-old daughter of rocker Lenny Kravitz and actress Lisa Bonet, and Indian model Padma Lakshmi, 37. All of the ladies - dressed in black - strike simple poses. The headline "a dollar saves a life" is printed across each photo.