I created a background with strips of colored cardstock. I lined up strips of colored cardstock onto a piece of typing paper and then made horizontal cuts so that I had strips with lots of little squares. I lined them up and offset them onto a background. I love the effect! Looks like it took a ton of work, but it didn't!
I really wanted the image from the Sassy Girls - OMG! Stamp Set to stand out, so I decided not to color it! I usually see this technique done with floral stamps, but why not people?!