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