The 'My Life Would Suck Without You Singer' and husband Brandon Blackstock welcomed their first child together, baby River Rose, in 2014.
Appearing on ITV's This Morning today, she said: "She is the best thing ever… it's so sad because when they grow and get longer they lose their chub, and I love the chub! It's so cute.
"She's so happy, I love her!"
While Kelly was being interviewed, little River was out sightseeing with dad Brandon and her siblings. Brandon has kids Savannah and Seth from a previous relationship.
"She's out with her dad right now and her sister and brother, we have the whole family here because both of our daughters' birthdays are next week so we're going on vacation. But they're all here sightseeing!"
"They couldn't care less about me, they want to meet Ariana Grande and Harry Styles! My kids are over me!" joked Kelly.
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