I'm the fussiest eater on earth; my husband despairs. I like chicken and pasta, and can't resist milk chocolate. I figure if you're going to do something naughty, make it really enjoyable.
For years I used to try to straighten my hair, but I've reached a stage where I think, 'I've got red curly hair, and it's actually really great.'
I just have to express myself somehow, either through singing, dance or fitness. You get sick of it; you have days where you think you don't want to do it, but generally after I've done something, I feel better. That's why I do the exercise: to earn my bar of chocolate and cappuccino.
I'm a deeply boring person in real life; I don't do any drinking and going out until four in the morning. I'll usually head straight home for a cup of tea.
Dance never really goes away; it just reforms and reinvents, and it's become more athletic with new connection to fitness and sport. Dance used to have this exclusivity, but not any more.
I love Monet: his 'Water Lilies' would look great on my wall. But would I prefer to see money helping kids get better from cancer rather than spending it on a work of art for my own personal indulgence? Yes, I probably would.
As a dancer, I've always checked my body constantly: 'Am I having a good day, or am I having a fat day?' I am probably more critical of myself than anyone else. I am very tiny - 5'1 and a half inches - so there's nowhere for weight to hide.
'Dr Who' is an extraordinary association that I have because I didn't realise until I was in the show quite how worldwide it is and how popular and how dear it is to so many people's hearts.
I don't read reviews, and I try not to read articles about me. It taints your outlook: if you believe the good things, you've got to believe the bad things, too.
I'd got a part in the original cast of 'Cats' when I was 16, and that kept me going for a while. After that, I felt lost, both personally and professionally - I was trying to find a way not to be seen only as this bubbly, bright, vivacious person. It felt like I'd lost the freedom to make mistakes.
It's been said of me that I must get out of bed every morning and go cartwheeling down the road. Of course it's not true. There certainly was a time in my 20s when I wanted a bit of freedom, and I found that difficult, but if I'm ever having a time when I'm feeling sorry for myself, something always jolts me back.