Get all great on a song. By far the hardest achievement in the game, and about the only one you may not get from grinding out songs. Now, song 'selection' is a huge part of this achievement as I couldn't often get a Great rating on the shortest of notes, so you have to hope for a short song with no short notes to come up. The second method is to find an English song you can do well in and practice it. Then when you start a new 'Gig' if it isn't in the list of songs, hit then and the list refreshes with a new selection. Without this achievement the game would be an easy 1000. This will require luck and patience. Remember, this must be done in Superstar mode as well.