| 554. Maria Reis | Background Vocals, Keys | 1 |
| 554. Maria Taylor | Featured Artist | 1 |
| 554. Maria Telesheva | Accordion | 1 |
| 554. Maria Volonte | Featured Artist | 1 |
| 554. Mariachi El Bronx | Featured Artist | 1 |
| 554. Mariachi Flor De Toloache | Featured Artist | 1 |
| 554. Mariah Meshae | Background Vocals | 1 |
| 554. Marian Li-Pino | Drums | 1 |
| 554. Marian McLaughlin NPR | Featured Artist | 1 |
| 554. Marianne Khattar | Vocals | 1 |
| 554. Marie Bérard | Violin | 1 |
| 554. Marie Ulven | Guitar, Vocals | 1 |
| 554. Mariella Price | Vocals | 1 |
| 554. Marika Clark | Vocals | 1 |
| 554. Marilena Umuhoza Delli | Spokesperson, Translator | 1 |
| 554. Marina Albero | Keys, Soundscape | 1 |
| 554. Marina Arrufat | Strings | 1 |
| 554. Marina Carmona | Vocals | 1 |
| 554. Mario Castro | Keyboards, Tenor Sax | 1 |
| 554. Mario Gabriel Mesa Meriño "Machete" | Percussion | 1 |
| 554. Mariola Orellana | Vocals | 1 |
| 554. Marisa Anderson | Featured Artist | 1 |
| 554. Marit Schmidt | Viola, Vocals | 1 |
| 554. Mariza Scotch | Vocals | 1 |
| 554. Mark "Bobo" Bowen | Guitars | 1 |