Princess Beatrice and her husband Edoardo Mapelli Mozzi were pictured alongside a popstar at a glitzy film premiere. The royal couple stepped out with singer James Blunt at his premiere screening of “James Blunt: One Brit Wonder” at Picturehouse Central. The Princess of York and Blunt have had a close friendship for many years, and have been photographed together as far back as 2013. Beatrice’s younger sister, Eugenie, is also known to be close with the singer. The royal couple and Blunt posed at the premiere alongside the singer’s wife, Sofia Blunt, and Gabriela Peacock, Beatrice’s nutritioni…