To thank fans, or Mad People, for supporting them through a month's worth of promotions, Mad Town have uploaded very a special dance practice clip!

The boys take on the trending challenge of switching parts with one another, even introducing themselves as the member they switched parts with in the beginning of the clip. 

Surprisingly, Mad Town do a really good job performing "Emptiness" after changing up their positions... so much so that you almost can't tell! Watch for yourself above!

SEE ALSO: Mad Town revealed to have driven themselves to schedules in rental cars + evicted from dorm