Ahead of the premiere of their upcoming reality show 'Amazing f(x)', f(x) gave their devoted fans a preview of their trip to New Zealand through a special episode! 

Among the cool tidbits they showed, Krystal going skydiving and this "amazing" snippet of Luna and Amber singing an acoustic version of the group's hit song "NU ABO".

Amber shows off her guitar skills and the pair harmonize quite well. Those unfamiliar with Amber's singing skills were quite shocked at how she and Luna matched perfectly in the song.

What do you think of their acoustic cover? 

In case you have never heard the original, check it out below: