Think about the brony singer Chi-Chi. She can preform different songs despite the musician/mixer behind is different in every song. The concert arranger just asks all different miku artists for their collaboration.

Is THAT how it's done? O.o I legit had no idea, that's kinda fun! So if you made a popular Hatsune Miku song there's a chance it will be played at a concert if they contact you. That's pretty cool!