iphone will only sync and pull songs i bought

[windy1]

How do i get the rest of my songs to download, i lost them all from my iphone when i upgraded? They are all in my library. I have tried syncing about 5x already.
Thankyou

 

[Small White Car]

Could be a weird glitch. Un-check the box that says to sync music so that it removes ALL music from the phone. Once that sync is done, turn it back on and try again.

Sometimes I've had weird things happen for no reason and turning the feature off, syncing, and then turning it back on fixes it.