By Denny Dyroff, Entertainment Editor, The Times Tiffany Korean American pop star Tiffany, who will make her Philadelphia debut with a show at Union Transfer (1026 Spring Garden Street, Philadelphia, 215-232-2100,www.utphilly.com) on November 6, has a lot of talent and a lot of followers on social media. She also has a lot of names. Tiffany, as she is known in Korea, is also known as Tiffany Young,...