Attention opera fans, pop lovers and even rock 'n' roll devotees: It's a cornucopia of vocal power and gymnastics with a little comedy sprinkled in when these ten larger-than-life tenors take the stage armed with nothing but their talent and a heavy dose of showmanship. These musical chameleons first captured the public's attention when they appeared as the memorable surprise guests at the Eurovision Grand Prix de la Chanson in Kiel, Germany.