I raised my sister. I was six when she was born. My mother had to make a living for herself and it was very hard, so I was looking after my sister, cooking and cleaning, and she had four jobs.

I was born in Nizhny Novgorod to a very poor family and unfortunately my father and mother separated when I was very little.

I live a very different life now, with incredible privileges, but looking back I realise that growing up in Russia gave me tools that other people don't necessarily have - such as the will to push that bit further, to make things happen, to succeed.

Before I left Russia in 1999, I was living in a very poor factory town with my family and friends, and nothing was ever going to change.

I completely admire my mother for raising a child with cerebral palsy at home.

When you become a mother, you think less about yourself and care more about the world.