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