some of my songs are not playing all the way though

Previously while listening to my playlists, everything was fine, they all played with no problem. Today I come back and now all my songs in one of my playlists only play a brief part of the songs, almost like clips, then goes to the next song in the playlist, haven't checked the other playlists yet.
So I don't know what happened....any explanations? Can this be fixed or do I have to delete this playlist and start over? I hope not, I have like 30 songs on here.