All answers share something in common.
-1. You might be as nutty as one
-2. A bad time for Caesar
-3. Also known as "The Big Dance"
-4. 1995 African-American demonstration
-5. American indie pop singer
-6. Also known as "Babes in Toyland"
-7. Nickname of John Philip Sousa
-8. Retreat of the Red Armies of China in 1934
-9. 2005 documentary about the Emperors
-10. American health charity
-11. Notice of dismissal
-12. The last song that a bachelor hears