The other day my music app froze so I rebooted my iPhone, and when it turned back on, all of my music was missing. I plugged my phone into my laptop and attempted to re-sync in itunes but it WILL NOT sync. Photos and ringtones and everything else syncs just fine but music refuses to. While the phone is syncing, the capacity bar fills up with blue, recognizing that I'm trying to sync music, but as soon as it's finished syncing the blue disappears. The Sync Music box is checked, the Selected playlists, artists etc box is checked, the boxes for each album I'm trying to sync are checked. When I click on iPhone > Music, all of the songs I'm trying to sync are there but they are faded grey... they just never actually sync. What is happening?! I've tried deleting/re-installing itunes, rebooting my laptop, rebooting my phone, everything. Please help.