Josh Groban

American baritone Groban may be the epitome of gazillion-selling classical-crossover schmaltz, but his talent is undeniable: he even once stood in for Andrea Bocelli. At this big London show he’ll be roof-raising with inspirational anthems like ‘You Raise Me Up’ (better known over here as a hit for Westlife) and Broadway numbers from his new album ‘Stages’.