The pregnant pop star strolls with Sean P in Malibu. Plus: Jennifer Aniston, Vince Vaughn, Heather Locklear and more

CHAMPAGNE WISHES

Gavin Rossdale has reason to celebrate as he hauls a caseload of champagne out of a Los Angeles liquor store on Friday: That same day, he and wife Gwen Stefani welcomed their first child, son Kingston James McGregor.