| Name | Roles |
|---|
| Otten, Josef | Performer (2) |
| Otter, Anne Sofie von | Performer (3) |
| Otter, Hans den | Performer |
| Otter, Laurens den | Performer |
| Otterson, Pamela | Performer |
| Otterstad, Fredrik | Performer |
| Otterstetter, Lisa | Performer |
| Ottesen, Helle | Performer |
| Ottingnon, Eden | Performer (2) |
| Ottley, Jerold | Conductor, Music_Director |
| Ottley, Jo Ann | Performer |
| Ottley, JoAnn | Performer |
| Ottmar, Otti | Performer |
| Otto | Performer |
| Ottó, Magócs | Performer |
| Otto, Norm | Performer |
| Ottosen, Carl | Performer |
| Ottosson, Katarina | Performer (2) |
| Otway, John | Music, Lyrics, Book, Performer |
| ōu Pèi Yíng (歐珮瑩) | Performer |
| Ou, Tina | Performer (3) |
| Ouali, Kamel | Music, Lyrics, Book |
| Oude, Marjan de | Performer |
| Ouden, Jonne den | Performer |
| Oudenaarden, Mirthe van | Performer |
| Oudijn, Ad | Performer |
| Oudshoorn, Cindy | Performer (2) |
| Ouellet, Gilles | Orchestrations (2), Producer |
| Oughton, Robert | Conductor |
| Ouki, Kaname | Performer (2) |
| Oulad Thami, Fatima | Performer |
| Oura, Mizuki | Performer (5) |
| Ourisman, Jamie | Performer |
| Oury, Alet | Performer (12) |
| Ousen, Ole | Performer |
| Ousley, John Mack | Performer |
| Ousley, Robert | Performer (6) |
| Out of Eden | Performer |
| Outen, Denise Van | Performer (5) |
| Outhwaite, Tamzin | Performer (2) |
| Outten, Richard | Book |
| Ouweland, Marit | Performer |
| Ouwens, Aletta | Performer |
| Ouwens, Tinka | Performer |
| Ouwer, André | Producer |
| Ouzounian, Richard | Lyrics (2), Book, Liner_Notes (3) |
| Ovalı, Murat | Performer |
| Ovelar, Charo | Performer |
| Ovelar, María | Translation (12), Performer (2) |
| Ovenden, Julian | Performer (6) |
