We're not sure why this is an obsession for people, but it is. There's an increasing trend for everybody to appear the same height in pictures. It doesn't make any sense, and it's not how things work in real life. We suppose it might possibly matter more to children than it should to adults, because being much shorter than someone your own age also makes you look younger. Nobody wants to look like the little kid.
These two best friends wanted to look the same height, and now they do. All Fridman had to do was completely remove the torso of the taller girl, and then re-attach her arm to the side of her head. It would seem that he isn't just a wizard with Photoshop; he's also not bad when it comes to extreme surgery. Most importantly, though, they're now the same height. Request fulfilled.