Kellie Pickler returns to American Idol on Wednesday (April 8) to perform her latest single, "Best Days of Your Life." Pickler and Taylor Swift co-wrote the song which is the second single from Pickler's most recent album. Pickler was a finalist during the 2006 season of the TV show. "Going back to American Idol is like going to a family reunion. Well, it's more fun than going to my family reunions," she laughed. "Seriously, it's always great to see the gang and feel the excitement from the contestants."