Sir Elton John's son is a "great antidote" to unhappiness.

The 'Rocket Man' hitmaker - who along with partner David Furnish became parents to baby Zachary via a surrogate mother last Christmas Day (25.12.10) - can't help but smile whenever he thinks of the "adorable" youngster.

He said: "When I'm singing at night, I sometimes think of him during a set and burst out laughing. He's a great antidote to feeling miserable. Every single second he's just adorable.

"He just makes me smile so much. He's just a gorgeous little boy."

Elton, 64, admits becoming a father later in life is the "icing on the cake" because he has already had so many wonderful and memorable things happen to him, but he is learning to treasure every moment.

He told Magic 105.4 FM DJ Neil Fox: "My life has been quite remarkable, some of the things that have happened to me I never dreamt would happen to me ever. So this is the icing on the cake!

"He's six months, he's had his first solid food. It goes so quickly."

Elton and David, 48, have established a routine for Zachary, which has led to the 'Your Song' hitmaker becoming an expert in children's literature.

He explained: "Every night at 6.30pm we read him a story, that's the highlight of the day. I've become an expert on children's books.

"Of course we've done the 'Hungry Caterpillar'! He likes 'Stick Man' and also 'The Gruffalo'. Julia Donaldson is amazing, she's fantastic."

Elton will be performing at Magic Summer Live at Hatfield House, Hertfordshire, East England, on July 17.