Off-Duty Hollywood

From roller-coaster rides to an inflatable slide, see how the stars – Gwen & Kingston! Tori! Justin! – take time off from the set and stage

GOING TO A BIRTHDAY PARTY

Down whee go! Gwen Stefani and son Kingston, 3, take a quick ride down an inflatable slide at a superhero-themed birthday bash in Sherman Oaks, Calif., on Saturday.