Currently Being ModeratedMar 26, 2013 10:01 AM (in response to sandra2421)
If you are able to redownload music in your region, delete the song from your library and redownload it thorugh iTunes in the Cloud.
This article will walk you through redownloading music:
Downloading past purchases from the App Store, iBookstore, and iTunes Store
This article will help you determine what content is available for redownloading in your region:
I hope this helps! Best wishes and good luck!