The 44-year-old actress, who is currently promoting new comedy Bad Moms, became tearful as she discussed her five-year-old daughter, who she shares with husband Martyn LeNoble.

"I love my kid... more than I've ever known (is) possible," she said, as she began to break down during the video chat. "Like, humanly possible. It's a spiritual thing. I really love her."

Christina admitted the strength of the love she felt for her daughter took her by surprise, and confessed the mother-daughter bond made her re-evaluate her own relationship with her mum, actress and singer Nancy Priddy.

"I feel bad. There were times I didn't treat my mum all that great," the former Married With Children star explained. "I had no idea how much she loved me."

Bad Moms, which also stars Mila Kunis, Kathryn Hahn and Kristen Bell, follows three overworked and under-appreciated mothers who ditch their responsibilities for some well-overdue freedom and fun.

While her character in the movie may want some time away from her kids, Kristen, who is mother to daughters Lincoln, three, and Delta, 19 months, insists that couldn't be further from the truth in real life.

"How much the love you have for them is indescribable. How it immediately right-sizes all of your problems," the 36-year-old, who is married to Dax Shepard, said. "Kathryn always says when you're not with (your kids), it's like missing a limb... that's what it feels like."