Where do I find more music?

Mostly I'm wanting Get It Together by The Go! Team. But I would also like to know how to find more.

Besides the ones in all the story levels, there's a DLC pack you can buy with bonus music in it.

Music is basically spread throughout the story levels like normal prizes.
But LittleBigPlanet has a guide that shows where any prizes are.

Simply search every nook and cranny in the story levels and you will find music. In my first play-through I managed to find a majority of the songs, with the exception of a few. If you purchase the MGS level pack you can get s few more, and as Jagrevi said Mm released a bonus music pack that contains two new songs. Good luck in your music hunt!

EDIT: If you are looking for "Get it Together" by the Go! Team, it is located in "Skate to Victory", in the Gardens, above the floating shoe. You will need the red lion sticker to obtain it.