Patriots quarterback Tom Brady and his wife, Gisele Bundchen, helped photographer Mario Testino celebrate his new exhibition at Prism in West Hollywood over the weekend. Bundchen was also there for Testino when he opened his display at the Museum of Fine Arts last year. Meanwhile in Boston, former Globe writer Carol Beggy and publicist Jan Saragoni helped “Anderson Cooper 360°’’ producer and Granite State native Jack Gray celebrate his new book, “Pigeon in a Crosswalk: Tales of Anxiety and Accidental Glamour,’’ at a party at the home of Saragoni and Ben Bradlee over the weekend. Revelers included NECN’s Jenny Johnson and Mike Nikitas, and WGBH’s Emily Rooney and Jared Bowen. Gray will sign copies of “Pigeon’’ on Monday night at the Brookline Booksmith.