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