This was so easy to do... I slopped on blobs of different paints (some were metallic, some glossy, some matte) and then blended them across the canvas (11x14) with a foam brush. I let it dry, then added a few more streaks of paint where I wanted to add more of a certain colour. When it was dry, I put a couple SU! catalogues behind the canvas (the perfect height to even out the frame) and applied the medium Always Bird decor element to the canvas. I used a hot glue gun to add ribbon to the edges to cover the staples on the canvas.
edited to answer question from Leslie in the comments...
I used a primed canvas that I bought (already stretched on the frame). It had the normal canvas texture, and my painted background added even more. It isn't lumpy, but you can feel the different layers of paint. I had a harder time getting the Decor Elements onto the transfer paper than I did applying it to the canvas. It went onto the canvas much easier than I expected it to.