How in the world was this taken?!

I have 2 images here, and i simply cannot figure out how the photographer did them.
http://a442.ac-images.myspacecdn.com/im ... fadb89.jpg
and
http://a40.ac-images.myspacecdn.com/ima ... b4b69f.jpg
I understand there is obviously external lighting being used, probably 2 softboxes on the left and right.
But you need short shutter speeds to avoid movement blur in the models, and long shutter speeds for the city in the background.
i can think of 2 ways...
high iso shot and then obviously a large amount of noise reduction is done, but i don't think so as too much detail has been kept
or maybe its 2 exposures, 1 with the models in it, and another of just hte background well exposed....
either way, they have done it well. For those in the know... how do you take pictures like this?!
http://a442.ac-images.myspacecdn.com/im ... fadb89.jpg
and
http://a40.ac-images.myspacecdn.com/ima ... b4b69f.jpg
I understand there is obviously external lighting being used, probably 2 softboxes on the left and right.
But you need short shutter speeds to avoid movement blur in the models, and long shutter speeds for the city in the background.
i can think of 2 ways...
high iso shot and then obviously a large amount of noise reduction is done, but i don't think so as too much detail has been kept
or maybe its 2 exposures, 1 with the models in it, and another of just hte background well exposed....
either way, they have done it well. For those in the know... how do you take pictures like this?!