The Do It... achievement requires you to get five stars performing the 70's craze song while in story mode. Somehow, even when playing on Easy, I managed to only get four stars (I got every other craze song achievements though).
Now since the craze song is not a complete song, it doesn't actually appear in the song list after you've finished the story mode.
My question is: how do I unlock this achievement now that I have finished the story mode? Is there a way to reset the story mode progress or is the partial song hidden somewhere that I don't know about?