My ITunes app is gone after I restored my iphone 4s

BFisher1001 Posts 1 Registration date Wednesday April 3, 2013 Status Member Last seen April 3, 2013 - Apr 3, 2013 at 12:17 AM
After I restored my iPhone the iTunes app wasn't there and all tje music I have purchased won't work and I'm assuming I have to restore my puchases in order for my songs to play/come back.
But again my iTunes app isn't there in order for me to do that, I have tried to reset the home screed and that didn't work.... What do I do!?