Mariah Carey/Melissa Benoist
- Episode aired Nov 25, 2015
- TV-PG
Mariah Carey (A Christmas Melody (2015)); Melissa Benoist (Supergirl (2015)).Mariah Carey (A Christmas Melody (2015)); Melissa Benoist (Supergirl (2015)).Mariah Carey (A Christmas Melody (2015)); Melissa Benoist (Supergirl (2015)).