Done on my iPhone in Brushes using both a Pogo Sketch and my finger.
This is the safe for work version of my first real nude artwork (maybe NSFW). I decided to practice some figure drawing using a number of photos on DeviantArt for reference. Here's the result.
I'm really happy with with it, so I may do some touch-up work in Photoshop later and make it into a desktop wallpaper.
PS. Checkout my new art critique blog untitledimage.com (always taking art submissions).