Why can't I play/skip/pause my music ftom the lock screen?

[AC Question]

I have a Samsung galaxy s4, and I would like to know how to make the music widget appear on the lock screen so I don't have to constantly unlock my phone if I want to play/skip/pause a song, thanks!

 

[SinfulDroid]

What music app are you using? Some music apps have settings to turn on/off lockscreen control's.