Music bought on iPhone will not show up on the phone after syncing it to iTunes?

I have bought music on my phone in the past and now none of it showing up after i sync my phone to my computer and does not show up in my library either until i select "on this device" when my phone is connected to my commuter and even then there are exclamation marks next to the songs and it doesn't give me any options to fix it or anything so i bought all these songs and i can't even listen to them. What do i do

Its mainly because the computer you had synced your iPhone to didn't have any of the music in the iTunes library.

But how do i get the music onto my phone again

You can use iphone transfer software to copy Apps, Contacts, Songs, Videos, Photos, Playlist, Games, etc between iphone and computer. Here's the one I used to use
http://www.001-software.com/itransfer/

  • Why is iTunes not syncing some of my music? I have 2 albums of Red Hot Chili Peppers, Dani California and Greatest Hits, and when I sync them to my iPhone, I tap on Red Hot Chili Peppers and it only comes up with Dani California and non of the others appear. Why is it doing this?
  • My entire iPhone data has changed after syncing to iTunes, how do i change it back? I just synced my iPhone to iTunes and now the contacts, settings, apps, and photos have changed to my old iPhone data which is backed onto iTunes, but my newest phone is not backed up to iTunes, is there a way to get my new iPhone data back on to my iPhone?
  • Music transfers to iphone 6 plus, but will not show on phone itunes library? I have the current ios on both my mac itunes and iphone 6 plus ios as of today july 14, 2015. i have only the "sync all music" tab checked. On my phones summary it shows there's 52gb worth of music on my 128gb iphone 6 plus. 52gb of music is how much is on my itunes library on my mac. I have deleted all music off of my phone, and then re synced and the music still doesn't show. what can i do? how can i trouble shoot this? any suggestions? Any help?
  • Itunes won't give me the option of syncing my iphone after i updated it I'm going on a 5 day trip tomorrow and i deperately need my music, & my phone was being slow so i updated it and now when i go onto itunes and everyhting is hooked up like normal, the little sync button on the bottom where it shows how much data you still have isn't like, highlighed, so i can't click on it.same as if i go to music and press sync it won't let me. Please i really really need some help!