The diva gives London a parting shot as she steps into a new role – spokesmodel. Plus: Cameron, Fergie & Josh and more

BUDDY SYSTEM

They were first spotted shredding the waves together – now Cameron Diaz helps her surfer pal Kelly Slater (not pictured) mark his 35th birthday at a bash held at the Mercedes Grill in Marina del Rey, Calif., on Wednesday. But Slater put romance rumors to rest when he told PEOPLE recently, "We're just friends."