My music appeals in America. There is less of the purist criticism I get here. And to be a hit in the U.S... what singer doesn't have that dream?

People see you sing in a certain way, in a long dress, and you are put on a pedestal like you have never made a mistake in your life.

Singing has always been my big passion and I would love to be able to go to the U.S. and perform more.

You learn your lessons from the mistakes you make, not the things you achieve.

Beatbullying's 'The Big March 2012' is such a brilliant campaign and I am very proud to be a part of it. I have been a victim of cyber bullying myself and I know firsthand just how hurtful it can be. People think that they can hide behind computers and send nasty and hurtful comments to people, and this is wrong.

I get 'voluptuous' a lot, or 'shapely,' but the fact is that as you get older you learn to embrace your body type. I wasn't able to do that until I was at least 23.

If you love somebody, you love them. My parents had a 25-year age gap between them and my mum was the breadwinner, my dad the house husband. I'm a strong believer that a good relationship can work, whatever the situation.

2012 was the year I saw Twitter as a negative. More people need to realise that not everything they read is true and that Internet trolls are a real problem.

After doing 'Doctor Who,' I'm open-minded to doing more acting. Part of the reason you do a show like this is because it creates other opportunities you haven't had before.

Although I'm not shy when I'm singing, I am whenever I hear applause. I don't know if you've noticed, but I giggle a lot on-stage. That's shyness. And the stage manager is always telling me to take a longer bow whenever I come off-stage. I still haven't learnt to do that properly. I see other artistes milking the applause, but I can't quite do it.

At the weekend, one of the paparazzi left their lunch box filled with half-eaten pasta salad on my doorstep: it was like a little warning, you know? 'We have been here.'

For me, with the Blue Man Group, I got asked. It was for the Royal Variety Show, which was something I always wanted to be a part of. I'm really interested in things people don't necessarily expect. I did a pop song, but I did it in my own style.

From as young as I can remember, I always wanted to be a singer... My mum taught me 'Going Down the Garden to Eat Worms' for a competition when I was about 4.

Growing up with my family gave me some of my best memories. I'd like to have a family of my own - slip away for a bit and do nothing but spend those early years with my children.

I always want to give my best and do the best I can. I know when I have sung my best and when I haven't. There can be stresses and hassles with time travel and press attention. I just have to adapt and find a way of dealing with it.

I am fussy, about my diet and straining my voice. I know, sounds a bit over the top. But I'm not as bad as I used to be. These days I don't drink alcohol for five days before a show - very dehydrating for the vocal cords, and all that acid reflux. I used to ban it for a fortnight. Nightmare.

I can't leave the studio until everything is as it should be. And I can't put a record out unless I am completely happy with it. I never want to be at a signing and hear my album playing and think, 'Oh no, I could have done that top note better.'

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.

I do follow a version of the Dukan diet, but I don't follow it to the extreme so a lot of fish and vegetables. If I want chocolate I'll let myself have a bit of chocolate in moderation.

I do not understand where the idea came from that opera is only for privileged people, I am as happy singing before 70,000 people at the Millennium Stadium, as I am in front of a few hundred in a small concert hall.