Q: My songs suddenly disappeared!!  Ipod Touch 5, IOS 7

- A glitch occured, The sequence seems to have included restoring you iPod and iTunes loosing the location of the music files on the computer. The ! point means that iTunes can find the actual music files. Then the iPod was restored (the iPod gets erased) and they was nothing to sync from your iTunes library.

- Try finding the music files

iTunes: Finding lost media and downloads

- You can redownload most iTunes purchases by:

Downloading past purchases from the App Store, iBookstore, and iTunes Store         

Glitches did occur sometimes

Posted this on another thread. I hope this helps.

Hi, I've had the same experience and I just want to share to everyone the solution I've found for this problem, after 3 gruelling days of research -_- thankfully, i found this and it worked great for me

https://discussions.apple.com/thread/3909940

(thanks to GeekDad3)

Issue:  iOS Music application either has items listed in the library that will not play; or has an empty library but iTunes reports that music is present on the device and taking up space; or a combination of these issues coupled with the inability to resolve the problem through the standard resolution steps of disabling music syncing to remove all music and then re-enabling or by enabling "manually manage library" and removing the items.

Additionally, attempting to restore from a back-up does not resolve the issue and the default response from the Apple Support Community is to factory restore the device and treat as new device, resulting in loss of all settings and basically starting from scratch.

Cause of issue:  Corrupted iOS device iTunes library (MediaLibrary.sqlitedb).  This database stores the iTunes Media records and related information such as playcount, lyrics etc.  It does not store information and settings regarding iOS Applications as far as I am aware so this should be safe.

Resolution Steps:

1. Perform a back-up to your local computer rather than iCloud if practical.  This will be quicker in the event of issues.
2. Download a iOS device manager such as Phone View which will allow you to directly access the file structure of the device.  (This will NOT require an illegal jailbreak to be performed!)
3. Enable the Advanced View mode so the entire disk structure is accessible.
4. Browse to the following file:  iTunes_Control/iTunes/MediaLibrary.sqlitedb
5. Rename MediaLibrary.sqlitedb to MediaLibrary.sqlitedb-backup or similar
6. Hold down POWER and HOME on your iOS device until the Apple logo appears.  Release both buttons.
7. When device has rebooted, connect to iTunes and synchronise it.
8. iTunes will detect that the Media Library on the device is missing and recreate it based on the items that it has listed in the iTunes synchronisation record for the

For Windows users, I suggest that you download Touchcopy in order to access the files mentioned in the thread above.

I hope this is the solution for everyone having this problem. You won't have to reset your device. |t's really simple

Hey thanks, I think that's working for me...(still waiting for changes to be applied) so fingers crossed...

My question is, we can see what is happening (corrupted medialibrary file) but do we know WHY? Is there anything we can do to stop the corruption?

I honestly have no idea, I just found that solution around the forums (which i linked back to in my post). Sadly, it's only temporary. I hope the ios update fixed this problem, but i doubt it 

Don't worry, songs are completely replacable. just go into the ITunes Store, go to the Music tab, then go to Purchased and redownload your content free of charge.