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