Why is my Samsung Music Player cutting my songs??

[AC Question]

I have a Samsung Galaxy Fame, and I play my music in the pre-installed app. But recently I've has this problem where the song will play for about 30 seconds and then it stops. When this happens, the whole app freezes, I can't un-pause or change the song. The only way to get it to work is closing the app and opening it again. But the weirder part is that it always happens in the exact same part of the same five songs. I thought the files must have been corrupted when downloaded, but two of the songs played perfectly fine before. And I only have this problem with them. What could be causing it?