Seen here hanging out in one of their dads' Green Bay Packers themed basement rumpus rooms, a group of girlfriends pose during the holidays for the internet's latest unintentional optical illusion. Obviously, there's a pair of legs missing. First, you have to solve who's legs are missing (I thought it was #4), then you have to figure out where the missing legs are. SPOILER: they do all have both legs, and I was wrong. You can see two photos of the solution below, which I probably never would have gotten even if I took the time (very unlikely) to edit the photos in Photoshop and adjusted the brightness and contrast. Who knows, maybe you saw it right away. Congratulations. Although it only took me a millisecond to figure out who the designated driver was (#5), so there. Finding a ride home is like a sixth sense to me.
Keep going for the solution.
Thanks to Catherine, who wants to know where these girls' parents' legs are, because they look a little young to be drinking.