Demi Lovato x Morning Musume: Cool for Knowing Nothing

Mashup details:
Arrangement: Cool for the Summer by Demi Lovato
Vocals: Watashi no Nanni mo Wakacchanai (私のなんにもわかっちゃない) by Morning Musume (モーニング娘。)
Opposite direction mashup here: • Morning Musume x Demi ...