What is that song with a weird music video?

You see, last summer, I liked this song so much. But now, I forgot the title of the song, the tune, and the singer! The only thing I remember is the music video because it was weird.


It's like this:


The people (especially the girls) are wearing weird outfits (the girls were wearing gowns like those in the old times)


And this one girl has a really weird blonde hairdo and her dress is blue. And there's like a stage where the singer sings and everytime the chorus part goes on, the girls dance and lift their dress up. And there's also a part with kissing.





that's all I know so please HELP!