The fabric in this room is absolutely lovely. My favorite is the use of such a bold print for the headboard. (Click here for the tutorial on making your own headboard.)
Similarly, I love the fabric for this headboard. Hobby Lobby has such a great selection of fun, graphic prints right now. I spent 30 minutes on Saturday just walking through the fabric section :)) Sarah knows just what fabrics to put together. To mimic her design, pick a bold pattern, then search for a subtle complement and a basic stripe, dot, or textured fabric. Lay them on the fabric table in a layer to see how all will look together. Take out what you don't like until you find your grouping of 3 to 4 fabrics.