Overrated Ayu songs and underrated songs

[gogirlanime]

Which songs do you think Ayu's done that are overrated? I think M is WAY overrated... I didn't find it that good, the remixes rock though. Naturally, UNITE!, and Kanariya are overrated songs too in my opinion

In terms of underrated songs I think a song is born is WAY underrated, it's such a beautiful song and the duet is fantastic! The song has so much meaning behind it too. Others would be Real me, Heartplace, P.S II, and WHATEVER those are great songs in my opinion. What does everyone else think?