to be honest, I'd rather they sing to me since i suck majorly at singing
...but I would probably go through hardcore training and singing lessons to sing before them...and I'd ask for advice...and fangirl over them...
What if one of the FJ/Kala girls had a serious throat infection (or something like that) that damaged their vocal chords and they ended up not being ever able to sing again? I keep coming up with really morbid ones for some reason