MNPD asks for your help to keep 'Let Freedom Sing! Music City July 4th' safe Nashvilleâs Let Freedom Sing! Music City July 4th event is expected to bring a record-breaking crowd to Music City, which means police and emergency officials will be working around the clock. and last updated 2021-07-01 21:15:32-04 NASHVILLE, Tenn. (WTVF) â Nashvilleâs Let Freedom Sing! Music City July 4th event is expected to bring a record-breaking crowd to Music City, which means police and emergency officials will be working around the clock. Law enforcement agencies will be working this weekend to keep between 300,000 to 400,000 people safe and itâll be no small task.