Betty Van Allen (March 17, 1927 – June 22, 2009) was an American operatic mezzo-soprano who had an active international singing career during the 1950s through the 1970s. In the latter part of her career her voice acquired a contralto-like darkening, which can be heard on her recording of Sergei Prokofiev’s Alexander Nevsky with conductor Eugene Ormandy and the Philadelphia Orchestra. She was known for her collaborations with American composers, such as Leonard Bernstein, Aaron Copland, David Di...