The twosome take a private stroll on a Malibu beach. Plus: Sarah Jessica, Angelina, Mary-Kate, Britney and more

SWEET DUET

Alicia Keys and Usher make beautiful music together at the Black Ball fund-raiser Thursday in New York. Keys hosted the annual event benefiting the Keep a Child Alive Foundation (for which she is an ambassador), which works to get HIV/AIDS medicine to families in Africa.