Boston advertising executive Jane Deery couldn’t help but turn heads Sunday night during the Oscars. Deery, the CEO of PRG Media, wore an elegant Michael De Paulo gown and was snapped with a nattily attired Ben Affleck at the exclusive Vanity Fair Oscar party. Designer De Paulo, who dresses many of Boston’s boldface names, described Deery’s sophisticated frock in an e-mail as a “black halter, duchess satin bias-cut gown, with lace insets.” Very chic indeed. Of course, Deery had many brushes with celebrity over the weekend. She was one of 60 guests of VF publisher Edward Menicheschi at Spago during the Oscar telecast, then she was whisked off to VF editor Graydon Carter’s swank A-list affair, where she got an eyeful of Leonardo DiCaprio, Martin Scorsese, Bradley Cooper, and U2.