A Self centered rising young artist must put aside his ego when he is forced to compete against his on and off girlfriend, for a record deal with a famous rapper’s upcoming label.

Good point!

Why is she on again off again? Wouldn't the story have more impact if she was 'the one'

In other words, where is the emotional conflict if it is simply a take it or leave it relationship?

Anti-hero? I was actually going for something like that for the girlfriend as she is considered the antagonist in my story indeed. Your logline is well put I like the idea you gave me to really think about thank you so much.