It was all about fun in the sun for our favorite social-media-savvy stars this week. Lea Michele, Rita Ora, and Bar Refaeli were just some of the bikini-clad babes to share their summery snaps, and Alessandra Ambrosio palled around with Brooke Burke and a scaly friend. Sofia Vergara celebrated her birthday with a giant cake while Miranda Kerr spend time at the park with her little man Flynn, and Nicole Richie busted out the Cabbage Patch during an Extra segment with Mario Lopez. Also in the mix? Jay-Z's art-gallery rap-athon in NYC and Ian Somerhalder's steamy photo shoot in Italy.