On The Next HERE'S THE THING: How Burton Cummings Came To Play The Flute On The Guess Who's "Undun" by SiriusXM News & Issues published on 2017-09-21T14:08:08Z Legendary "The Guess Who" singer Burton Cummings explains to Alec Baldwin how he wound up playing flute on hit song "Undun", after Randy Bachman convinced him he could play the instrument. Want to hear more of Alec Baldwin's discussion with Burton Cummings? Tune in to "Here's The Thing", Thursday 9/21 at 9 PM EST...on SiriusXM Insight (Channel 121).