Five things I know about style: Joss Stone

My mum is more stylish than me. She and my grandmother taught me that you don't have to follow trends, and what you wear is a form of self-expression. My grandma is really into matching all her colours – I do admire that. What I wear is about me. It's not about anyone else. My music isn't just about me – it's about other people and making them feel good, so I don't care what people think about what I wear. It's the one thing that is mine. I'm quite comfortable naked. I don't work out, and I may not have the best body in the world, but I don't mind. I'd be worried about it if I was a model, but I'm a singer, so I don't care. I'm healthy, and that's what is important. Earrings are essential. I wear them with everything. There is nothing that doesn't need a pair - even if you're in a hoodie and wellies, a pair of hoops makes the world of difference. I feel like a boy if I don't wear them. I'm not into vintage. It's just another word for old. Sometimes I'll go to a vintage shop and only find one piece I like – you really have to rifle through for hours to find anything good. Joss Stone sings for Help for Heroes on 22 March (see joecalzaghe.com )