Why won't music sync to my iphone 4s?

I have the updated version of itunes and ios7 on my phone. Yesterday, i downloaded some music off the internet. The music is in my itunes library, but will not sync to my phone. I did not have this problem before ios7. Any ideas?

I don't understand why you iPod, iPhone and iPad guys keep relying on sync to put music on your iPods when it so often doesn't work.

I never sync any of my devices to put music on it.instead my iTunes is set for manual management of music and video. I almost never have problems putting music on my iPod and obviously much fewer than those complained of in questions like yours which are posted here in the thousands - including loss of music to put songs on my iPod.

Manual management is just clearly superior in every way and it works on iPods, iPhones and iPads both new and old. I've tried it on first generation nanos, iPod 4, iPad 3 and iPhone 5

  • Why won't my music sync to my iphone? - 3 Ok well i'm trying to Sync my tones to my Iphone 4 but its not letting me, when i click on sync on Itunes it says "Preparing to Sync" then "Determining apps to sync" then it stops, it doesn't sync it. What can i do?
  • Why won't my music sync to my iphone 4? Everytime I try to sync it, it just says the apps can't be determined! I'm only trying to sync one playlist!
  • Why won't my music sync to my iphone 4S? I just restored my iphone 4S and everything synced perfectly fine, contacts, mail, apps, everything except music. I tried re-syncing, making sure I had checked each song in my music library, checked "sync music" on my phone settings on itunes, manually checking the music I want under "selected playlists" and what not. I have absolutely no idea what to do now.
  • Why won't my music sync to my iPhone? - 2 I have an iPhone 3g. It's never had a problem before this. I hit sync because I just got a lot of new music, and when I checked to see if it was there, it wasn't. I even restored the device and now even LESS music is on there. The "manually move it" or whatever isn't checked. It's not corrupted. Maybe the music files?