I suppose no introduction's necessary, but just for the sake of clarity: This is a portrait of The Joker.
Usually I have a somewhat clean style of painting/drawing, but I felt a bit of chaos would be appropriate for this one.
Time: 2-3 hours max
References: none or several, depending on how you count. This is not based on any specific photos. I had the image in my head but I looked at about 25 different photos of Heath Ledger(also in other roles than the Joker) to figure out his face correctly.
Tools: Photoshop CS3 + Wacom Volito2 tablet
Brushes: 1, I think it was a charcoal something
The original is about 5-6 times bigger.