The members of ABBA (from left): Bjorn Ulvaeus, Agnetha Faltskog, Anni-Frid Lyngstad and Benny Andersson at Waterloo station in London in 1974, the year the group won the Eurovision contest with the song "Waterloo." John Downing/Getty Images hide caption

itoggle caption John Downing/Getty Images

The Desperadoes Steel Orchestra, 120 members strong, plays in its home panyard in Trinidad. Sean Mikha'el Field for NPR hide caption

itoggle caption Sean Mikha'el Field for NPR

Queen Latifah plays blues singer Bessie Smith in the HBO movie Bessie. Frank Masi/Courtesy of HBO hide caption

itoggle caption Frank Masi/Courtesy of HBO

B.B King in 1996. David Redfern/Redferns hide caption

itoggle caption David Redfern/Redferns

Julian Petty. Courtesy of Nixon Peabody hide caption

itoggle caption Courtesy of Nixon Peabody

Kamasi Washington's new album is called The Epic. Courtesy of the artist hide caption

itoggle caption Courtesy of the artist

Neil Portnow (left), president and CEO of The Recording Academy, talks with Lee Thomas Miller, head of the Nashville Songwriters Association International, at a music licensing hearing in 2014. Paul Morigi/WireImage for NARAS hide caption

itoggle caption Paul Morigi/WireImage for NARAS

Iamsu in NPR's New York studio in March. Polina Yamshchikov for NPR hide caption

itoggle caption Polina Yamshchikov for NPR