- 1 Olivia Rodrigo
- 2 Olivia Dean
- 3 Olivera
- 4 Olivia O'Brien
- 5 One T
- 6 Otilia
- 7 OR3O
- 8 Olive Beat
- 9 Oonagh
- 10 Orla Fallon
- 11 ooxygen
- 12 Olivia Broadfield
- 13 Oh Susanna
- 14 Orenda Fink
- 15 Orianthi
- 16 Oh Land
- 17 Olivia Theresa Longott
- 18 Olivia Henken
- 19 Ornella Vanoni
- 20 Odetta
- 21 oleta adams
- 22 Olivia Newton-John
- 23 Omara Portuondo
- 24 Ophélie Winter
- 25 Orli Shaham
- 26 Oumou Sangaré
- 27 Olia Tira
- 28 OK Sweetheart
- 29 Olivia Kay
- 30 Orelia Has Orchestra