O.O
well the styles between ayu and christina(calendar) is pretty close..there's this 50's/60's theme to it..christina's one look more classy/grand then ayu one imho
i don't think ayu intend to copy...i think is more of a fashion thing
she is the fashion queen of jpop after all...so don't think she did
edit:



just the color/fur carpet thing is similar...the rest i don't think