The idea behind Il Divo was simple (and so deviously ingenious that it's no surprise it was masterminded by Simon Cowell): create a youthful counterpart to the Three Tenors using the template of boy-band pop groups. It's a formula that has proved wildly successful, but at Agganis Arena on Thursday, the quartet delivered a show that was almost a parody of how to sanitize popular culture for an audience that feels it's passed them by.
The incessant drive for elegance recalled the scene in "Titanic" where the passengers retired to their respective evening entertainments: boring cigar chitchat in first class and raucous dancing down in steerage. With its operatic approach to pop songs such as "Unbreak My Heart" and "The Winner Takes It All," Il Divo was the first-class crowd, tasteful to the point of inertness.