There are fake snowmen, but for the life of me, I can't remember where they were in MGM. I remember my DS5 exclaiming that the snow wasn't real though.
I think the snowmen are near Mama Melrose in front of a shop, perhaps a Christmas shop. As you exit Mama Melrose, facing the Kermit statue, go to the right. I think they are just down that street.
Another funny pic idea that I, uhm, "borrowed" from somebody is to take a pic of someone on the first street entering MGM with the Sorcerer hat in the background. Align the hat to their head, and if taken from just a few feet in front of the person, it looks like the hat is on their head. Well, sort of anyway. DW didn't realize I did this to her. She thought it was so funny!