My iPod nano skips some songs for no apparent reason

When i try to play songs on my iPod nano 7th gen, it skips some of them without playing.
The album art and track name shows up for a split-second and then it goes to the next track. Sometimes it skips several tracks by the same artist at a stretch. The songs the ipod keeps skipping play perfectly on iTunes. I tried erasing all the songs and sopying them again, but it didn't solve the problem. (I haven't tried restoring the ipod yet)