| 596. Blakley | Background Vocals | 1 |
| 596. Blanca Castilo | Musician | 1 |
| 596. Blanche Israel | Cello | 1 |
| 596. Blind Pilot | Featured Artist | 1 |
| 596. Bloc Party | Featured Artist | 1 |
| 596. Blood Orange | Featured Artist | 1 |
| 596. Blue Man Group | Featured Artist | 1 |
| 596. Blue Rondo | Keys, Piano | 1 |
| 596. Bluu Suede | Background Vocals | 1 |
| 596. Bly Wallentine | Bass, Rainstick, Vocals | 1 |
| 596. Blöthar the Berserker | Vocals | 1 |
| 596. Bo Lark | Fiddle, Voice | 1 |
| 596. Bo Lucas | Vocals | 1 |
| 596. Bob Boilen's Favorite | Featured Artist | 1 |
| 596. Bob James | Piano | 1 |
| 596. Bob Kildea | Guitar, Vocals | 1 |
| 596. Bob Lanzetti | Guitar | 1 |
| 596. Bob Mothersbaugh | Guitar, Vocals | 1 |
| 596. Bob Mould | Featured Artist | 1 |
| 596. Bob Weir | Guitar, Vocals | 1 |
| 596. Bob Weir And Wolf Bros | Featured Artist | 1 |
| 596. Bobby Bare Jr. | Featured Artist | 1 |
| 596. Bobby Drake | Drums | 1 |
| 596. Bobby Hall III | Keys | 1 |
| 596. Bobby Hawk | Violin | 1 |