Sir Elton John refuses to miss out on precious moments with his sons while he is working and even bathes his boys backstage at his Las Vegas concert venue.

The pop superstar is father to two sons, Zachary and Elijah, with his partner David Furnish, and the singer has revealed he goes to great lengths to make sure their routine is not interrupted while he is playing a residency in Las Vegas.

The Rocket Man even bathes the boys backstage at the Caesars Palace resort before he goes on stage.

He tells U.S. news show Extra, "A ritual I love is 6.30 tubby time... Even in Las Vegas, he (Zachary) has his bath backstage, now we have to bathe two of them backstage... They're (the baths) very portable."