The spectacularly-bearded Smooth McGroove has an impressive knack for rearranging well-known video game themes in a capella, using only his voice and his cat. He picked a really good one in his latest video, the Spark Mandrill theme from Mega Man X.
This is an A Capella version of Cara Mia, the "turret opera" from late in Portal 2. I don't really know why you'd sing this, but vocalizing music as beeps and boops is a big part of A Capella, so it works just fine.
Danny Fong applies his amazing vocal talents to the Pokémon television show theme song, performing not only all the voices, but vocalizing the music as well in a stunning display of a capella coordination and shirt variety.
