Do "yeah yeah's" or "la la la's" in Ayu's songs ever bother you?

[AyUmIXx]

not that peco and princess sound bad..but i almost listen to the same kind of wowow wowoww yeahhh yeahhh in these recent concerts..
can do some other tones or something?
haha XD

n i don't mind Peco and Princess with their solo parts, they always do great..
i'm talking about when Peco - Ayu - Princess always do together..that's a little bit repetitive in the tone wise? or the same exact way haha XDDD