- 1 Olivia Rodrigo
- 2 Oonagh
- 3 Olivia Dean
- 4 Olivia Newton-John
- 5 Origa
- 6 Olivia Herdt
- 7 ooxygen
- 8 Otilia
- 9 Olivia O'Brien
- 10 Orianthi
- 11 Olia Tira
- 12 Orla Fallon
- 13 Olivia Holt
- 14 oleta adams
- 15 Ornella Vanoni
- 16 Oceana
- 17 Ofelia K
- 18 Ony
- 19 Olive Beat
- 20 Orkid
- 21 OR3O
- 22 One T
- 23 Olivia Addams
- 24 Oly
- 25 Olivera
- 26 Ofrin
- 27 Olivia Broadfield
- 28 Oh Susanna
- 29 Orenda Fink
- 30 Oh Land