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