The Unsung Overdub Star In 'Sound Of Music'

In last week's interview with actor Christopher Plummer, host Scott Simon jokingly asked if he still sings "Edelweiss" once in a while. Several listeners wrote to point out that Plummer's singing was over-dubbed by Bill Lee. In an outtake from the interview edited for time, Plummer explains why the moviemakers decided to insert the voice of another singer.