No Doubt frontwoman Gwen Stefani has revealed that her new baby son, Apollo, was a surprise addition to her family and she fell pregnant with him just a few weeks after her 8-year-old son Kingston prayed for another sibling. 

Speaking to 'Late Night' earlier this week, the 'Spiderwebs' songstress explained that she wasn't planning to have another child because she already had two boys, but Kingston's prayers were shockingly answered:

"He [Kingston] has a direct link to God, basically. He asked me, 'Mum, are you gonna have a baby? I want you to have a baby.' I was like, 'It's over. We're not having any more. This is our family.'"

She admitted that Kingston would say, "Dear God, please let my mum have a baby. Please, God! Please let my mum have a baby!", adding: "Four weeks later I was pregnant!"

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Check out Stefani's collaboration with Maroon 5 on 'My Heart Is Open' below: