The singer, 36, gave birth to Scarlet last year, her daughter with partner Thomas Starr.
Speaking to Hello! magazine, she said: 'It's really quite an odd feeling but after having Scarlet I kind of felt invincible. Like: 'Wow, if I can have a child, I can achieve anything.'
'She is my priority now. Sometimes, where I may have been scared of failure, I now just think: 'No. You've just got to go for it.''
She added: 'At first it was very, very scary. It was quite a shock just getting my head around this new person in my life, and realising how much time is devoted to taking care of her.'