What was the first released single on the self-titled album released by an American country artist whose second single was co-written by Taylor Swift and released on December 1, 2008?
Kellie Pickler (album):  The lead-off single, "Don't You Know You're Beautiful", was debuted at the 43rd Academy Of Country Music awards and peaked at 21 on Hot Country Songs. 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. Best Days of Your Life:  The song is about a narrator explaining how her former boyfriend cheated on her and moved on to a new girlfriend to start a family with, wishing them well on their new life but says that the new girl won't top what they previously once had before.
i don't know