Gwen Stefani thinks her baby son is a ''miracle.''

The 44-year-old singer was adamant she and her husband Gavin Rossdale didn't want to have any more children but she was left stunned when she fell pregnant with Apollo, six months, after her eldest son Kingston, eight, asked God for another little sibling.

Gwen - who also has Zuma, six, with Gavin - explained: ''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.' ''

Imitating her son, the blonde beauty said Kingston would clasp his hands together, close his eyes and say out-loud: 'Dear God, please let my mum have a baby. Please, God! Please let my mum have a baby!'

She added: ''And four weeks later, I was pregnant!''

The 'Voice' USA coach, who married Gavin in 2002, admits she's slightly concerned about what Kingston will pray for next because his faith is so strong.

Speaking on 'Late Night' on Wednesday (03.09.14), she explained: ''He prays for everything. [He's like], 'Please, God, please let me have another cupcake... Yes!' He really believes.''