ok,  canned heat /on the road again  has to be one of the best easiest songs ever 

its just dum dumda dum all the way you can ace it on hard maybe even master 

for good score attack. and as a practice song .

i just like to add after making this post , i can see more people on the leaderboard 

if any 1 knows more real easy songs id love to get the achievement 10 songs on full mastery,thanks.