Ipod touch help please look i've asked this so many times and i've gotton crap answers?

okay so i put the songs boom boom pow and low/apple bottom jeans on my ipod touch idk how many times and it like stops in the middle of the song and won't play for each of them but they work fine on my computer so can anyone tell me what i can do ? should i take it back and get a new one i have the warranty is there anything i can do to ifx it ?i don't pull it out before it's done charging and i've reloaded the songs many times