Songs looping part at the end?

So I use iTunes to upload files from my computer to listen to on my phone. When I get to the end of most of my songs, the last 5-60 seconds of the song will loop randomly. The ONLY way I've ever been able to fix it is to delete the song, open it in audacity, and export it again, but now almost all of my 140 songs are doing it and it's become a gigantic hassle. Is there any way to remedy this without having to go through this process????