Music Player widget on the Lock screen
Once you’ve started playing music, a Music widget will be automatically
displayed on your Lock screen so you can conveniently control your
music without unlocking the screen. It includes icons for Rewind 
, Play 
, Pause 
, and Fast-forward 
.
NOTE
From the Lock screen, you can swipe left and right across
the top of the screen to toggle between the Music widget and the current
time/date. To be able to unlock the screen, tap the Lock icon 
(at the bottom
of the screen).