OK, now it's not about Ayu "copying" someone (why do we even use the word "copy"?) it's about someone "copying" Ayu :p
Some months ago I was looking for Tamura Yukari songs on youtube, and when I first listened to Anata dake ni ~it's only my Love~ my mind screamed immediately "AYU'S SEASONS!!! XD"
Well, the chorus has a similarity to SEASONS' one ^^;
What do you guys think? Did she sampled from Ayu or it's just pure coincidence?
(btw, this song was released in 2002)