Can anyone help me find this song?

Man I'm frustrated! I watched the video about a week ago and the song is stuck on my head but I can't remember the lyrics. The band is on stage, dressed up in 60's clothing, looking sort of like THE BEATLES. And there are chic dancers, all dancing at the same time. They're dressed in red and blue. The song has a fast, alternative rythm. I thought it was the band "FUN" at first but it's not! This is like... pop-rock. And it's new, by the way!