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