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