The singer became a mum to son Titan 14 months ago, and she admits practising patience with him has made her stop sweating the small stuff around the house she shares with husband Tim Weatherspoon.
"I was nervous that I didn't have the patience to be a good mom, because before Titan I had zero," she tells the new issue of Parents magazine, "but now I am very patient.
"The Bible verse 'love is patient' is real! I don't make the little things into big issues like I once did. My OCD had to go out the window. My living room looks like a freaking day care!"
And Kelly also had to stop stressing about her mummy dreams when she learned she couldn't breastfeed Titan.
"I had my heart set on breastfeeding, but I wasn't producing enough milk," she explains. "I got down on myself, which I think was mentally limiting my supply."
She turned to friends who are mums, like Beyonce, for plenty of advice, especially when she realised she wasn't getting any sleep - even when her baby was snoozing: "Even when the baby was sleeping, Tim and I weren't! That first week, Tim would poke at Titan to make sure he was breathing."
The couple is now getting the hang of parenthood, and Kelly has even started offering up advice to other new mums seeking to lose the weight they put on while pregnant.
"Write on your mirror in lipstick: 'I had a baby. I'm a superhero,'" she tells Parents magazine. "It takes about a year to get the weight off. Don't beat yourself up if it takes even longer."
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