This week we feature reggae’s cool ruler Gregory Isaccs, two bold souls in vocalists Janelle Monáe and Leela James, and we close out with 19 versions of Charlie Chaplin’s song "Smile" featuring Janelle Monáe, Diana Ross, Jimmy Scott, Kaclu Terrasson, Lina Nyberg, Hugh Masekela, Djavan, Jacintha, Etta Cameron, Take 6, Bireli Lagrene, Donald Brown, Ruth Brown, Milt Jackson, Jerry Butler, Kenny Burrell, Mariza, Sonny Criss and Sun Ra.