Carrie Underwood's official site features a story about her appearing on the newest Read Y'all posters.
Carrie has been selected by the state of Oklahoma to participate in their statewide literacy initiative Read Y'all poster campaign. These posters were funded by Underwood's hometown library syste, Eastern Oklahoma District Library System, and are distributed free of charge to every public, school, academic, and special library in the state of Oklahoma.
Carrie is the 6th cover subject since the campaign began in 2002
Update: I found a thumbnail of the poster (as you can see here). See, isn't Carrie Underwood a cutie?