Question: Kellie Pickler is the self-titled second studio album by the American country artist, Since the albums' release, three more singles have charted; including which song, written and performed by American country artist Kellie Pickler, and co-written by Taylor Swift, at number 9?
Sentence (from "Best Days of Your Life"): "Best Days of Your Life" is a song written and performed by American country artist Kellie Pickler, and co-written by Taylor Swift.
Relevant evidence: Yes