Britney Spears showed some skin yesterday when she ran errands in LA wearing short shorts and a barely-there top. She was happy to show off the results of her long hours at the gym, and possibly her new interest in yoga. The singer spent Halloween without her boys, Sean Preston and Jayden James, who went trick-or-treating with their dad, Kevin Federline. Britney has, though, been busy working on music. She also visited a studio yesterday, and apparently met Jersey Shore's Pauly D. After he tweeted that his life was completed by saying hi to her, she responded with an, "Aww, nice to meet you too."