Maki Goto - Some boys! Touch
Namida nuredasu hitomi'
She holds the su onto the next word and it sounds like 'Shit on me [shit on me shit on me echos]'. She seemed to stop holding that note quite early on in live performances, I guess someone told her not to say it like that, haha.
Melon Kinenbi - Unforgettable
These are all the male echos in the song
'Like a fish'
That MKB song gave me the lols for days.
There are so much more as well, I'll have a look through my songs and see if I can remember more.