The pop star dresses down for a ride to L.A's Social Hollywood. Plus: Miley Cyrus, Paris Hilton and more

TWO OF A KIND

Paris Hilton brings good tidings Tuesday at the Nissan Live Sets event on the Fox Studios lot in Century City, Calif. During the event, the heiress confessed to PEOPLE that she'd love to start a family, just like her pal Nicole Richie: "I want a baby so that our babies can play together."