Blake Shelton says being responsible for Gwen Stefani's children has been a "scary moment" for him.

Gwen Stefani and Blake Shelton

Gwen Stefani and Blake Shelton

The 'God's Country' singer has been dating the No Doubt frontwoman for five years and he loves looking after her three children - Kingston, 14, Zuma, 11, and Apollo, six.

Speaking to Entertainment Tonight, he said: "It's been a scary moment for me. It's one thing to be with the kids all the time and be their buddy but you do have to consider after a while that they start to listen to things that you say. There's a lot of responsibility that comes with that which is new to me."

Gwen had previously gushed over Blake's ability to be a "good" father figure to the three children.

The singer said: "He is a good dad, actually. He's been helping me out a lot. I literally get to the point where I'm like, 'You gotta get home - I need help!' It's hard. I got three boys.

"I feel as if I spent the last four years healing - you know, trying to build my life again. Having a best friend like Blake to help me do that has been one of the greatest gifts."

Blake is a "fun" father figure to Gwen's sons.

A source said: "He's so fun and has shown Gwen's kids another side of life filled with adventure. The boys have really grown immensely by spending time with Blake. They're all very like-minded and comfortable with each other. [Gwen] is much more relaxed and enjoys life more. Gwen has changed a lot since she met Blake, and it's all for the better."

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