Looking at it closer, it really does look like Belle with Betty's mouth, and Betty's hair colour.

Here you go. Cover girl is now a part of the game.

I've included the Photoshop project file (PSD) in the download package (ZIP), so you can see how I did it.

(She was made up of C015FAmed_belle with the mouth from C006FAmed_deb, and Betty's hair colour, from C001FAlgt_Shannon01.)

Oh my god thanks a lot Kenoi, she looks amazing.
You did great

In The Sims, actions that the sims can perform are called "skills" because these actions (and their related properties, assets, and animations), are things that the sims gain from the objects that are introduced into the game/scene. The sims don't start out knowing them, but rather the objects "teach" them how to interact with the object. This is why they're called "skills".

This was done so that the design of the game would be such that the game would be expansible -- with new objects introducing new features to the game.