What does Ayu yell during her concerts?
 

Hi everybody! This is my first Thread on this forum and I hope it is in the right topic ^^
I just want to ask what is Ayu yelling at 1:45 in this performance of Surreal?
https://www.youtube.com/watch?v=_OOdGU1tAaQ
It sounds like "Mou tsu-a", she says it several times in her concerts. Anyone know what it is and what does it means?
Thank you and sorry for my bad english, I hope you can understand me ^^

She's saying, "Yo-chan!!" and is referring to her lead guitarist whose name is Yoshio, but they call him "Yo-chan." :)

1:38 "Yo-Chan!"
1:45 "Motto!" = "More!"