YouTube is big business.

And women are increasingly making their marks. Roughly 20% of the partners are women, a number that is growing rapidly.

They are comedians and beauty stars, singers and parody specialists.

The top 10 boast almost 10 million subscribers between them, and all 10 consider their YouTube venture a full-time job.

10. Liz Nova parodies celebrities.

Channel: LISA NOVA

Subscribers: 717,474

Channel Views: 20,936,205

Heidi Montag UNSEEN footage from Access Hollywood!!!

9. Christine hopes people “slip into happiness” when they watch her videos.

Channel: HappySlip

Subscribers: 784,968

Channel Views: 17,097,321