At first sight I thought "Come on, two barbies singing a Love song, how original" But then I realize I couldn't judge them without investigating a bit more. I watch their YouTube videos, so I know they're talented, but this song doesn't do them justice at all. It sounds like your average pop song, and bit generic, like they're trying to fit some mold. Not original at all, and a bit Disney. When I hear the chorus it sort of reminds me of Teenage Dream by Katy Perry. I hope they'll do better.
Anyway, they're going to be really big.