Boot Camp by Robert Muchamore (Rock War #2)

Jay, Summer, Dylan and their bands are headed for boot camp at uber-glamorous Rock War Manor. It's going to be six weeks of mates, music and non-stop partying as they prepare for stardom.
But the rock-star life of music festivals and glitzy premieres isn't all it's cracked up to be. Can the bands hold it together long enough to make it through the last stage of the competition, or will there be meltdown?