Go to Pop Art Portraits page and open the project tutorial located at the bottom of the page.
1) find a portrait style photo. it does not need to be of a famous person but can be something trendy or popular to you.
3) create a new file in photoshop and paste your image in it and select and delete the background
4) change your image to black and white Image>adjustment> black and white
5) duplicate your person layer 3 times
6) on the top layer posterize it using 4 or less. Image > adjustment > posterize
7) start using your poly lasso tool to select shapes ie the eye or a dark shadow etc and start creating ben day dots ( a pop art style)
*hint choose 15 and below are your number in the top box
Bellow are just examples of image you could do.