Item description:

just load each save in the order of the saves and finish the dance thats on the island you start at
thats marked with either a crown (dance tournament) or an envolope (special) to get the
acheivement(s)

the best song to use for most them is Orange Sky(Arctures) on (expert/406 Combo/2000 fans) or
(oni/460 combo/2664 fans)
that is once you have unlocked it.

for the all songs beat just beat the song Safety Dance (Men Without Hats)

for the challenges the Blue ones are ones i tried but could not do,
and Black ones are ones i never tried, and the white ones are ones that are completed.