Currently Being ModeratedOct 17, 2013 2:43 PM (in response to Pman4)
Thanks for visiting Apple Support Communities.
If your most recently imported songs don't sync to your iPhone, you may want to try setting up syncing in iTunes again by following the steps in the article below. If you're syncing music, try un-checking and then re-checking the "Sync music" checkbox in iTunes.
iTunes 11 for Mac: Set up syncing for iPod, iPhone, or iPad
iTunes 11 for Windows: Set up syncing for iPod, iPhone, or iPad
If the song still doesn't sync, try the troubleshooting steps in our iPhone assistant:
Frozen or unresponsive iPhone
All the best,