Doodle Art/ Drawing
Anime and Realism lips tips by moni158 on DeviantArt
More helpful tutorials here. There really is no right or wrong style but there are a few guide lines. The upper lip generally juts out a little bit over the bottom lip and requires a highlight on the top part of the lip and the rest is shadowed and darker than the lower lip. The bottom lip needs a highlight on the center as this part stick out the most. The corners of the mouth also need a highlight on the bottom edge on the bottom lip. Lips come in many different shapes and colours.