The 23-year-old singer said that she panics so much when it comes to performing that she thinks the stress will kill her.
She told OK magazine, 'Oh my God, I'm crippled by fear. I have awful stage fright.
'I don't know what possesses me to do it. I think I'm going to die young from having so much stress all the time.'
She also admitted that she still lives with her mum because she needs her help to manage her day-to-day life.
'After my first record I moved out of my mum's and moved to Notting Hill on my own. My life fell apart,' she said.
'My phone got cut off, my credit card got cut off, the house was a mess. It was awful. I couldn't function without my mum so I moved back in with her. I'd rather be defeated than one day come in and the rats would be eating me.'
She added, 'My mum and I don't live in a tiny place. It's a big apartment. She can be at one end and me at the other.'