You can get a beautiful pop art in few seconds.
Open a image in PhotoShop. Change the Resolution to 100 dpi. Apply the command Ctrl+L and change the settings for the following,

The pictures will be more contrast colors. Then go to Image – Adjustments – Select the option ‘Posterize’ make the level 3.

Next go to Filter – Artistic – Select the option ‘Cutout’ and make the changes for the following.

Apply ok. Some detailed picture only you can do it. Make it you own pop art in 3 steps.
