Barry Mann and Cynthia Weil have written many songs together, but nothing beats You've Lost That Lovin' Feeling, the song they wrote on commission in 1964 for the Righteous Brothers, and more to the point for producer Phil Spector. In fact, it beats most songs by everybody else, too; it's been identified as the most-played song of the 20th century.
Mann and Weil are still a going concern, as songwriters and as a married couple. That may seem especially remarkable, given the candid tone of a song about a love that has lost its last spark. They appeared last week on Sound Opinions on U.S. public radio. The interview is definitely worth a listen.