All my music got deleted, how do I get it back?

As long as your account is still active

Turn iCloud Music Library off, then on again

On your iPhone, iPad, or iPod touch:

1. 1. Go to Settings > Music, then tap iCloud Music Library to turn it off.
   2. Close Settings.
   3. Go to Settings > Music, then tap iCloud Music Library to turn it on.
   4. Turn on “Show Apple Music”