| 574. Robert Kearns | Bass | 1 |
| 574. Robert Plant and Alison Krauss | Featured Artist | 1 |
| 574. Robert Stillman | Saxophone | 1 |
| 574. Robert Taylor | Drums | 1 |
| 574. Roberta Leono | Tambor Alegre | 1 |
| 574. Roberto Fonseca | Piano | 1 |
| 574. Roberto Lange | Guitar, Vocals | 1 |
| 574. Roberto Lorenzo | Trombone | 1 |
| 574. Roberto Verástegui | Arrangements, Keys, Piano | 1 |
| 574. Roberto Vizcaino Jr. | Percussion | 1 |
| 574. Roberts | Violin | 1 |
| 574. Robin Baytas | Drums | 1 |
| 574. Robin Bramlett | Bass | 1 |
| 574. Robin Dann | Vocals | 1 |
| 574. Robin MacMillan | Drums | 1 |
| 574. Robin Mullarkey | Bass, Percussion, Vocals | 1 |
| 574. Robin Olson | Featured Artist | 1 |
| 574. Robin Vining | Guitar, Vocals | 1 |
| 574. Rocco Nigro | Accordion, Audio | 1 |
| 574. Rocco Palladino | Bass | 1 |
| 574. Roddy Ricch | Keys, Vocals | 1 |
| 574. Rodney Crowell | Featured Artist | 1 |
| 574. Rodrigo Amarante | Featured Artist | 1 |
| 574. Rodrigo Avendano | Keyboards | 1 |
| 574. Roger "Jooseondrums" Benford | Drums | 1 |