Apple lets you control music playback on your iOS devices from the lock screen, but your options are very limited; you can play or pause tracks, and skip back and forth between them. But if you want to listen to another album, you’ll need to unlock your device and open the Music app to find it.
But not if you have Pluck installed. Pluck is a new tweak for jailbroken iOS devices that lets you access your entire music library from the lock screen.

