Cameron & Paul: Out in the Open

Cameron Diaz and her new boyfriend, Paul Sculfor, are putting their relationship out there for the world to see!

During a date last week to L.A.'s Getty Museum, the couple was the main attraction.

"They were giggling and kissing the whole time," an eyewitness tells OK!.  Indeed, Cameron, 35, is so smitten with her British-born beau, 37, she's even boasted to ex-love John Mayer, who she's still friendly with and happens to be dating Sculfor's ex-girlfriend Jennifer Aniston, that she's through hiding her romance.

Paul has promised to whisk her off for a romantic weekend in London and the pal tells OK! "John joked that if they huried they might catch up with him on tour!"