I thought that having boys would mean I’d be spared from repeatedly hearing the Frozen soundtrack Let It Go.

But like the snow in the part Norway, part Narnia Disney movie, the song is everywhere: in the car, on the TV, on the YouTube clips my boys devour. It’s their new life anthem, and they can’t seem to get enough of the animated movie this summer.

[Lowers voice] I think because they’ve developed soft spots for the two resourceful heroines – Elsa and Anna (carefully pronounced: “It’s ‘Ah-nah’ Mummy!”).

But it’s not the remodelled princess stereotype, or the way proactive Ah-nah rescues guys from danger by setting things on fire and throwing them at wolves that they like. It’s Elsa’s hair.

“Can I have an ‘Elsa’ please!”

“Mummy?” said Son2 yesterday. “Can you have your hair done like Elsa?”

“Erm … I could try,” I replied. “It might be impossible,” I warned. I didn’t want to disappoint him. I could just imagine the look on his face as I came out of the salon without Elsa’s long ice-blonde hair, huge glassy eyes and sparkly gown.

“Not her queen hair, Mummy,” said Son2. “Her ponytail.”

“I know,” I said. “You mean her loose, flowing plait – after her makeover.”

I hesitated. “But I wouldn’t look like Elsa,” I warned again.

Son2 thought for a moment. And, because anything’s possible when you’re 5, came up with a solution: “Just take the DVD box into the hairdressers and show them what Elsa’s hair looks like.”

With dark roots an inch long, dried-up split ends and general neglect due to 7 weeks away, I can almost hear my hairstylist attempting to suppress her laughter.