Princessskyees. How do I get it back?

Where did the music come from, and what has it been deleted from ? If its iTunes purchased music from the Music app on your iPad, and if it's still in the store and you haven't moved countries since buying it, then see if it shows in the Purchased tab in the iTunes Store app for redownloading (and check see if you've hidden any of it from the cloud : Hide and unhide purchases in iTunes or iBooks on your Mac or PC - Apple Support) ; if it's your own music, and if you aren't using iTunes Match and/or if you can't redownload it, sync it back from your computer's iTunes library

For the purchased music, if it's still in your country's store, and if you haven't moved countries since buying it, then go to the Purchased link under Quick Links on the right-hand side of the iTunes store homepage. For purchases that you can't redownload, and music from other sources, copy it back from your backup of your downloads/library that you've been keeping and maintaining