how do i listen to music on my iphone...

Ok Pls read b4 posting replies...

I just synced my iphone to my macbook..Added the playlist and synced the phone...But now when I go to ITUNES the music isnt there..The music is now on my iphone but still doesnt show up...Why does Apple need to be so difficult in everything it does? I remember my old phone I jus dragged the music and bam there it was but noo Gotta go thru a whole stupid process