Britney Spears and fiance Kevin Federline take Brit's sister Jamie Lynn and her friends to a Malibu field to play with their new remote control cars. The group raced the little vehicles around a baseball diamond before they were kicked out by park employees. Spears wore a tank top without a bra for the outing. She sent the photographers jumping when she sped one of the cars toward the gang of snappers! Thanks lime-light.org.