Please Explain the "V"

[SSL]

I've asked a guy who actually shoots these photos, Marty from Ladyboy Gold, here's what he said:

It's something cute that the girls like to do. From what I understand it's considered "Japanese" or "Korean" style. It's something that the models might do if they are posing themselves. I've seen some other fun things, like a clenched hand against the cheek or the girls making a big heart shape with their arms and hands above their head