And she also got to interview him afterwards for Newsround.

"Les Miserables is a really good musical, it's also quite sad and powerful.

I thought Jon blended in really well with the rest of the cast and I think he could continue in lots more musicals.

His singing voice was very good - he should have got more lead vocals in S Club.

Serious role

In Les Miserables, he plays a student in the revolution.

Obviously he doesn't smile as much as he did in S Club as it's a much more serious role, but he did it very well.

The fighting scenes on the barricade were the most exciting bit, because there was lots of gunfire and the tension was really high.

Jon got a standing ovation. When he was doing his song about remembering all his student friends who'd died I was close to tears - but I didn't actually cry.

After-show interview

I met Jon after the show and asked him some questions.

Louisa: Did you feel it went well?
Jon: I think it went well for a first performance!

Louisa: What was the hardest part?
Jon: I think the hardest part is the heat from the lights. It gets very warm especially with a coat on and a wig on your head as well.

Louisa: Do you think you'll attract a younger audience to the theatre?
Jon: I hope so - I know there's a lot of people, including some of my friends, who never go to the theatre.

Louisa: Do you want to do more musicals in the future?
Jon: I'd love to if another role came up.

Louisa: How is it different to when you were in S Club?
Jon: The main difference is that with S Club I had the team around me, and here I'm on my own playing a completely different character. It was kind of hard sometimes not to break out into my big cheesy grin, as there are some quite sad moments in this - so you have to try and keep a straight face.

Louisa, 12, London

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