I made this drawing of Macklemore last night after watching a little bit of the MTV VMAs with my daughter. In Photoshop, I used the Threshold command to force all of the pixels to either black or white. I then added a medium gray background tone.
Hiding the other layers and temporarily flattening the image, I changed the Color Mode from Grayscale to Bitmap using Halftone screen. I then chose Select All from the Select menu and copied the halftone background. I used the History panel to undo the flattening and then pasted the halftone pattern under the line work layer. I finished by adding some color.