The 'Since U Been Gone' hitmaker has revealed her eldest child River Rose has a bit of attitude but joked it was to do with "genetics".
Speaking on Late Night with Seth Meyers, she said: "She is a diva! I'm pretty sure it's something to do with genetics."
Meanwhile, the 34-year-old singer - who also has Remington Alexander, 5 months, with her husband Brandon Blackstock - previously admitted she feels "way more empowered" since she became a mother.
She shared: "Having kids cuts out all the bulls**t in the sense that I don't have time to do stuff I don't want to do anymore. I don't have time to make you feel like it was your idea. I just don't have time for it anymore, so it definitely cuts through the bulls**t and you just go straight for what you want ...
"It sounds so cheesy, but I feel way more confident, way more empowered and way more like I've got this. You just have so much going on all the time, especially because I'm a working mom - so many moving parts and so much navigation - that I just feel like I can do anything. I feel like the head of the village."
And having children is "very inspiring" for Kelly.
She added: "Being a mom is very inspiring. You don't think it's going to be because you're so busy but it's such a different world becoming a mother. It sounds like such a tool statement that every mom says, but it's just a different thing to mold a child's life.
"You feel very responsible, but there's also the magical elements that you forget because you're an adult. You forget how simple things like lights and fans can be so magical to them, so we definitely tried to capture that in the book."