H&M used to have a virtual changing room that they seem to have replaced with what they are calling a "Fashion Studio". Not quite as good as you can't adjust the model's size to match your own, but still quite fun to play dress ups (and I really don't enjoy dressing the men at all)...
Here is one outfit that I came up with - http://www.hm.com/gb/fashion/f.....%22f%22%7D