So recently (Passed few weeks) whenever I had my headphones plugged in Google voice search kept initiating, my music started playing my itself, amongst some other things. Its highly annoying. It's on 4.4.4, could upgrading do anything about it?
Are the headphones just pure headphones, or do they include a mic, or remote playback controls (like Play or Pause)? When you plug them in, do they snap in normally, or do they seem abnormally tight, or perhaps too loose? Check to make sure there's no debris stuck in the jack.