New father Sir Elton John has said he is "a gibbering wreck" in front of his baby son Zachary.
"He's the most divine little thing in the world," he told ITV's Daybreak programme.
The pop star and his civil partner David Furnish spoke of the joy of looking after Zachary, who was born via a surrogate in California on Christmas Day.
Sir Elton said: "He's only five weeks old, just over five weeks old, but those five weeks, you can't imagine how much love has come out of that little boy for us, and us for him, and it's been incredible.
"I'm like a gibbering wreck in front of him. I just sit there, I make up songs and sing to him in gibberish, I'm very good at gibberish now.
"He's the most divine little thing in the world. Now it's our chance to make sure we do a good job, and that's the hardest part."
Mr Furnish said: "It's joyful. I didn't think, after 17 years, we could feel any closer to each other, but I feel like the whole experience has brought us even closer together.
"I marvel at Elton at 63 years of age, attacking fatherhood for the first time. He's just a complete natural, he's rolled his sleeves up and got right involved, it's been wonderful."
Sir Elton added: "I thought 'I'm a young 63, let's go for it'. We knew we would get criticised, and that it's not everybody's cup of tea, you can't please everybody.
"We knew we would get a bit of flak, and we did, but we're big enough to rise through that."