John Prine debuts at No. 1 on Billboard's Rock Songwriters chart (dated April 18), leading for the first time thanks to six entries, which he solely wrote, on the latest Hot Rock Songs chart.The iconic singer-songwriter died April 7 at age 73 from complications of COVID-19.Prine's 1999 duet with Iris DeMent, "In Spite of Ourselves," leads his Hot Rock Songs haul at No.