The Three Tenors: Live in Concert (1990). Thirty somethings discovered the joys of the crossover digital compact disc as classical music went pop, with an evening at the opera top of the social agenda of the beautiful people. Three portly Italian gentlemen and a reclusive Polish composer made brief but spectacular entrances into the mainstream album charts. No self-respecting record buyer would be without a couple of jazz albums, a selection of tango and qawwali, an opera compilation and, the ultimate musical accessory of the 1990s, a generous helping of Gregorian chant.