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