BSPEARSSTRAPLESS061507_04.jpgBritney Spears BSPEARSSTRAPLESS061507_35.jpgWho needs the tanning salon when you've got a convertible? Certainly not Britney Spears, who bared her shoulders on Friday to more effectively soak up every second of sunlight she could on Friday as she cruised between Starbucks, Shutters, and the Mimosa Nail Salon. (And trust Britney to choose an appropriate soundtrack for shimmying out out of her sundress - like Jay-Z's "Dirt Off Your Shoulder"!)