Iggy Azalea
Azealia Banks
Cassie
Brandy
Nelly Furtado
FKA Twigs
Tove Lo
Cher
Kylie Minogue
Avril Lavigne
Christina Aguilera
Madonna (as a musician)
Fifth Harmony
Tinashe
Michael Jackson
Elvis Presley
The Beatles
Whitney Houston
Mariah Carey
Madonna
I never heard of them until ATRL, and I lived in three different countries: Swaziland, Uzbekistan and the Maldives.