Question: 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?
{'answer': "Don't You Know You're Beautiful", 'supporting_facts': [['Kellie Pickler (album)', 1], ['Best Days of Your Life', 0], ['Best Days of Your Life', 1], ['Best Days of Your Life', 3]]}