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