Silhouettes and Illusion in Artwork

 So this is not exactly what I have been working on this week, but along the lines of ever developing my skills, I've grown to love the use of minimal detail for imagery and the eye completing the picture as well as the use of silhouettes. Here you can see just a taste of what I'm working towards with the two art styles and I will no doubt have many many more of these to come in future along with other styles I'm growing to love.

Extra points will go to those who can tell me in the comments the inspiration for all of these pieces, some obviously much easier than others.