The acts who wowed the judges at the closed-room auditions now face round two - appearing not just in front of judges Simon Cowell, Cheryl Fernandez-Versini, Mel B, and Louis Walsh, but also an audience of nearly 5,000 people at the more intimidating setting of Wembley Arena. With limited places available at boot camp, the singers must prove their first performances weren't just a one-off. (thetvdb.com)