When taking pictures, either with cam or the studio object, there are 5 copies unless you break the session. After taking those 5, I normally keep the most valuable as I thin k that one is the best...
I took those selfies with my sims phone. I have Mochino installed but have no idea if that SP is required for poses with selfies or if it is base game.
Here are some different poses I found for selfies (there are more in the game). The first two are definately part of the same 5 photo session, the third one might be a second attempt.
