Sir Elton John has told of the "endless" love he feels for his children, following the birth of new baby Elijah.
In his first interview since the tot was born the musician said he had doubts about whether he would be able to love the new addition to his family as much as his firstborn Zachary, two.
But as he showed off his new baby, he told Hello! magazine: "I have learned that a parent's capacity for love is endless.
"When another child is born, our depth of love just grows deeper and wider, so it was very emotional," said Sir Elton.
Elijah Joseph Daniel Furnish-John was born on January 11 to the same surrogate mother who gave birth to Zachary, and the boys share the same egg donor.
The singer's partner, film-maker David Furnish, said: "Throughout our lives we have both loved and been loved, but the love of a parent for his or her child is different to anything else, as all parents will know. You find new depths of love, and experience pure joy."
The couple said they shared a strong bond with the woman who gave birth to the children, and they will "fiercely" protect her anonymity.
Sir Elton, 65, said: "She is a wonderful, kind and loving woman, who we love like a sister.
"We have a very close bond with her and were in constant touch throughout the pregnancy, getting updates, seeing scans and sharing all the little details that make those nine months so exciting.
He told Hello!: "She has given us two amazing gifts and we in turn have a duty of care to her and are fiercely protective of her anonymity."