The 38-year-old, who split from her daughter Scarlet's father Thomas Starr earlier this year after 10 years with him, says she experienced difficult times when she first became a mother, reported Femalefirst.
"I'm so much happier, more confident and courageous and it's all thanks to her. There were difficult times. In the middle of the night when she'd cry, then I'd start crying - but the rewards are fantastic.
"I knew when I got pregnant that things would never be the same again, but I didn't realise just how much things would change for me," she said.
Mel C also says she found it "really tough" being away from Scarlet to tour musical 'Jesus Christ Superstar'.
"I had to go away for two weeks with the 'Jesus Christ Superstar' tour. It was really tough. I don't want to do something like that again. Being a stay-at-home mum is probably the hardest job because it's so exhausting looking after children."