This achievement is very self explanatory really. You must play a song 10 times that that is not a GHTunes song. There is no star or score requirement, you just need to pass it. To find out your currently most played song press orange in the quickplay+ menu to bring up the sort options and then select “play frequency” this will put your most played song at the top, but unfortunately it does not tell you how many times you have played it. If you want to do this quickly and are not bothered at which song you play “2112 Pt. 5 – Oracle: The Dream” by Rush is the shortest on disc song (and it is fairly easy).