I don't think it's that powerfull, it's just that she displays her emotions well into her music, now that's what, to me, makes her special. She does sing pretty well especially live while others don't. I love Yuna Ito live too she sounds really great, I love Crystal Kay but live she just sounds... meh not that great. Oh and Hikki she's really something too. BONNIE PINK does the trick as well.
