They actually wear the same outfit every concert, so no one misses out :P If they have shows that weren't part of the actual World Tour, then they wear something else.
I wanted to ask you something, and felt the need to comment on this picture to ask it because it has Garbo in it. Ah, I love Garbo. :) Anyway, this stage and what they're wearing looks exactly the same as the concert I went to, is this the one in Phoenix, Arizona?