I'm over the moon to be involved in the 'Doctor Who' Christmas special. I can't quite believe it as it's a part of the family tradition at the Jenkins household. I heard the news that I got the role on my 30th birthday and it was the best birthday present ever.

I am a perfectionist.

I sing a mixture of everything from opera, folk music, Broadway. It's a mix of things.

My idol was Marilyn Monroe, who was a size 16, I think, and curvy in all the right places. I will never be stick thin. I remember a shoot where I had to get into these tiny hot pants, and I thought, 'God, I wish I hadn't eaten.'

My mother and father were perfect role models. They were together for 25 years and very much in love. But I've got too much to do now. I'm only 27.

I did once shatter a chandelier. I was singing with my college choir in Wales. I was the soloist and I hit the high note and there was this massive bang and all this glass came down from the ceiling. I'd like that to be my party trick if I can perfect it.

Marilyn Monroe was supposedly a size 16, which is probably why I love her style; it suits me better.