Psst. The answer is (mostly) sexism.
Recently, Anupama Chopra of Film Companion brought together four of the biggest female playback singers in Bollywood for a chat.
L-R: Neeti Mohan, Neha Bhasin, Anupama Chopra, Aditi Singh Sharma and Jonita Gandhi
Chopra asked them why Arijit Singh has been ruling the airwaves, while there haven't been as many famous female voices.
Film Companion
Just a quick glance at the top 10 Hindi songs at the moment will give you an idea of what she is talking about.
Arijit Singh is literally everywhere, but you wouldn't be blamed if you didn't immediately recognise every singer on Chopra's panel.
Mohan explained that there just haven't been as many opportunities to sing, while the rest backed her up.
FIlm Companion