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