Christina Aguilera, 45, wows in a plunging black gown as she joins youthful Eva Herzigová, 53, and Monica Bellucci, 61, at Prince Albert II of Monaco Foundation gala

Christina Aguilera, 45, wows in a plunging black gown as she joins youthful Eva Herzigová, 53, and Monica Bellucci, 61, at Prince Albert II of Monaco Foundation gala

Christina Aguilera wowed in a plunging black gown as she led the stars at the Prince Albert II of Monaco Foundation gala on Friday.