Too many awesome songs! I could never pick one! Lately, I've been in the mood for "Back to December", "Long Live", "Eyes Open", "Mean", "Fifteen", "Story of Us"...see I knew I shouldn't have even attempted to answer this...it's impossible for me...
I love all of her songs!! but my favorites are:
1. Crazier
2. the way I loved you
3. a place in this world
4. mean
5. I'd lie
6. dear John
7. enchanted
8. haunted
9. mine
10. sparks fly
11. I'm only me when I'm with you
12. you belong with me
13. eyes open
14. love story
15. speak now
16. better than revenge