I'm not a big fan of 1D , but I do like their song 'What Makes You Beautiful'. Beauty Is In The Eyes Of The Beholder & Once You Say That Your Beautiful , No One Else Should Tell You Otherwise. As well as , the song choice works with this contest set.
From what I've seen it kinda stems from Japanese like clothing. I really like this style, I first saw it when I played Jojo's Fashion Show a year ago :) What I like is that it has this Hello Kitty like thing to it. It really is something that you don't see that often unless your a fan of Lady Gaga, Nicki Minaj or Katy Perry :)