Demi Lovato

From childhood actor starring alongside a giant purple dinosaur to double platinum-selling recording artist. It's a well-trodden route and one that former 'Barney & Friends' star Demi Lovato has nailed pretty well. Tonight, she brings her brand of sugary electro-pop and chart-focused R&B ballads to north London for a rare UK date, belting out hits such as 'Let It Go' and 'Heart Attack'.