Today's top music news stories including M.I.A.'s vindication, a music industry revenue peak, and a charity initiative for Beyonce.

Over 150,000 people have already watched a guitar “shredding” duel broadcast live on Facebook this morning from A440 Studios in New Hope, Minnesota. It was a promotional stunt for tax preparation company H&R Block, which billed it as “the first ever guitar-powered document-shredding live event.” Famed metal axe-man Michael Angelo Batio held it down on…

Each year, the National Recording Registry (maintained by the Library of Congress) selects songs to be preserved that are significant to American history and culture. This year's additions are out, so sit back and relax as we play you a selection for today's 9:30 Coffee Break.

Depeche Mode was the first alternative British band to go to number one; Loretta Lynn was hospitalized; 'The Rutles: All You Need Is Cash' aired on NBC; and Phife Dawg passed away, Today in Music History.

Minnesota's own jeremy messersmith hits #1 on the chart this week with a track from his new record, 'Late Stage Capitalism'.

Today's top music news stories include new additions to the National Recording Registry, the growth of music piracy, and a legal win for Marvin Gaye's estate.

Twenty years ago, Lucy Kaplansky, Richard Shindell and Dar Williams put their solo careers on hold for bit to record and album and tour together as the supergroup, Cry Cry Cry. Last summer, the three friends agreed to reunite and even to do a reunion tour. That tour made a welcome stop in the Radio Heartland studio.

Our March Music Madness brackets are officially open for business and this year's them is "iconic voices". So print out your bracket, write in your predictions, share them on social media with the hashtag #VoiceMadness, and in the meantime let us know - what iconic voices do you want to hear for today's 9:30 Coffee Break?

'Astral Weeks' follows Van Morrison on a journey to Boston in 1968, as he developed the material that would become his most acclaimed album.

David Bowie and Iggy Pop got busted; Soul Coughing disbanded; Blondie's rap was their biggest crossover hit; and Rosie Stone was born, Today in Music History.