There's not much to go by but I still hope that someone knows the answer.
It's probably a girlband, at the beginning of the video you see two young women at a piano, a blonde one playing the piano, a redhead singing while leaning on the piano. Yet the song has got a pop-rock feeling and the chorus is quite catchy. In between the piano scenes you can see the redhead in animated scenes with a moon and something similar to that. There are other instruments played apart from the piano so there might be other band members or background musicians involved.
Yes, I know it's really not much . Unfortunately I do not even remember a single line of the lyrics. They were actually nothing special, just something along the lines of the usual.