Sienna Guillory

You can't really class all reality shows together. For instance, 'Top Chef' is about talent and competition. 'Big Brother' is more like what happens when you get all those narcissistic personalities crammed in together... and there are limits to that.

The thing about dancing - what it taught me all those years - is it gives you an amazing sense of discipline in forcing yourself to do things that you know are good for you but you don't really want to do.