I must admit I'm not part of the people who thought "OMG! Britney!" when they saw the title... I first thought of AC/DC's "Rock 'N' Roll Train"
It actually started playing in my head when I started reading this (LOL)
I don't understand why people keep comparing Ayu to other artists and claiming that she copies them. A circus is a very common term around the world (at least here in the west, not sure about Asia), and I've seen many circuses in my childhood, and saying Ayu copies someone by having a name with that word in it, is the same thing as saying Ayu is copying Tyra Banks because she straightened her hair (not that I know if Tyra straightened her hair recently). As long as the music, the concerts and the promo pictures and album covers are somewhat original and still Ayu, I'm happy.
Why fight because you have different opinions on something? If we all thought the same all the time, what would be the idea of a forum?