There is no better musical artist to celebrate during The Rev. Dr. Martin Luther King, Jr. weekend than American icon and national treasure Mavis Staples. Her reach and impact as a once-in-a-generation artist has been astounding. Staples is a member of both the Blues Hall of Fame and the Rock and Roll Hall of Fame, a Grammy Award winner, a Kennedy Center honoree, and a recipient of the National Arts Lifetime Achievement Award. As someone who began singing during the civil rights movement and marched with Dr. King, her longevity in the spotlight is a testament to her magnificent talent. Mavis Staples performed at John F. Kennedy’s inauguration and sang at President Barack Obama’s White House. And she’s still going strong. “At a time when most artists begin to wind down, Staples ramped things up, releasing a trio of critically acclaimed albums in her 70’s with Wilco’s Jeff Tweedy that prompted Pitchfork to rave that ‘her voice has only gained texture and power over the years’ and People to proclaim that she ‘provides the comfort …