Going crazeeeeeeeeeeeeeeeeee please help

Was in Germany recently and was MTV when heard this song, can't remember the bands name but had a girl singer was kind of rock/indie/pop, the music video contained two boys, at like a camp thing and concert footage. And the key word was WILKOMMEN. I have searched and searched but got nothing!. So if anyone could help that would be great as i am going insane, i would love to buy the song as i thought it was great!
Thanks
MC

Maybe by Tegan and Sara? Or by Feist?