That depends on what kind of songs you are talking about.
Town Tune: No, you don't have to pay to change your town tune. You can change your town tune at the Town Hall in the Civic Center. Just talk to Pelly/Phillis, and select "Change town tune!".
Song for your Jukebox/Radio/ect.: Yes, you have to pay bells to buy songs for your music-playing system.
Click on the related link and it will bring you to the Animal Crossing Community website page where it lists all the K.K. Slider songs.
bye guffawed attributive carjacks
Here's the URL to a website that has all the songs from K.K for all Animal Crossings: http://guides.ign.com/guides/16562/page_15.html
It's Animal Crossing's currency. Bells are used to pay off your debt, buy furniture, clothing, accessories, etc.
there will be a white machine in town hall( or an ATM).And you can pay there.
You Can Pay Your Deposit by Going To The Post Office
You can pay it off at the ABD. It is located in the city and in the town hall.
you pay your loan
No
pay money to the town
pay FIVE morgages o.o
its according to what your selling