To me it becomes a bit absurd to list ayumi's "worst" song, although there are some I don't care as much for as others, I think most of her songs are
ok - to -super fantastic top of the world. Many of ayu's "medicore" songs are better than the best songs of many other artists in my opinion.
Here it goes:
Best:
M
Fly High
Voyage
Boys&Girls
Trust
ASFXX
Moments
Game
STEP you
HEAVEN
Ourselves
Real me
Endless sorrow
Seasons
Audience
(have to stop now.... )
"Worst":
Signal
Friend
everywhere nowhere
Greatful Days
Honey
(Not really bad songs eh?)