If she ever sings July 1st "Flip & Fill Remix", vogue "Kirari Natsu Ayu Mix", WHATEVER "Ferry Corsten 'System F' Remix" (either one is good) or Daybreak "HAL's Mix 2002" I would definiely cry my eyes out and love her forever.
So yes, a acoustic/remix concert would be amazing. She has so many good remixes and acoustic versions that I'd really love her to perform.
