In the photo your lips are dark because they are generally a darker colour than the rest of the skin on your face, plus they are pursed and so are shadowed. In your piece you've coloured them a light colour, and therefore it looks like facepaint. I'd forget the reference and just look for some more lip pics instead. I usually go with the top lip being shadowed and the bottom in the light, although you might get an unwanted pout with that. Heheh, good luck.
