Adobe Tutorial - Leo the Lion
Last year I was commissioned to create a series of articles and tutorials involving Adobe Illustrator by Adobe for their official Adobe Illustrator blog

Below is the end result of the first tutorial with a zodiac theme, specifically "Leo the Lion", a close up of the face and the outlines. 

It was published on December 31st 2011 on Inside Adobe Illustrator.

Technical details: 100% vector, created in Adobe Illustrator CS5