Guys and gals. I'm after a good music player for my galaxy note 2 where I can change the track from the lock screen, without having to enter my PIN number. Any ideas?

Also, I'm really struggling with album art. I have album art grabber and it works fairly well, but I am also trying to manually put in jpeg covers to the folders of the album but that isn't working. Any ideas for this too?

Cheers

Power amp, i know it costs but it's the best android music player i've used.

So many equaliser presets (you can make your own). Sound quality is miles better than the stock player.
The interface is customisable)
You can change song from notification bar/lock screen/volume buttons
Downloads album art automatically. If it's wrong you can hold down on the album art and select your own from an online image search or on your phonehard drive.

Google Music let's you move on to next track.

As has been said already, Google Music will do what ya want.

Thanks guys. I'll give them a go.

I'd 2nd Power Amp.

I was dubious with some of the reviews saying it sounded better, but I bought it when it was on offer and it actually does sound better (along with the actual interface being excellent).

I use player pro. It's very customisable and has good options for playback.