The One Direction star says his son, who he shares with his partner Cheryl Tweedy, has had a huge impact on his life, reported Entertainment Tonight.
"It's changed me in every single way. It's the first thing you think about in the morning and the last thing you think about at night...
"It's his first Christmas. He's only going to be interested in the wrapping paper, so buy the shiniest one!" Payne says.
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