Winehouse steps into the spotlight during the 46664 concert honoring Nelson Mandela in London. Plus: Rihanna & Adam Levine, Blake Lively, Mary-Kate Olsen and more

KIDDING AROUND

Gwen Stefani and 2-year-old son Kingston are in on the joke as husband Gavin Rossdale catches up on a call Thursday at a London playground. The previous day, the expectant parents – sans their little guy – cheered on pal Roger Federer at Wimbledon.