It is a comparative study of popular female musicians in Ghana and black female diasporans (African Americans). What is different/similar/ with their music? Stagecraft, thematic concerns, contextual affirmations, etc
I will accept articles, books, ideas, and comments as I brainstorm this critical research.
Well, you didn't mention this in your question. But now that this is clarified, my next question relates to representative selections. Are there really that many who have made this relocation? And you do not limit the diaspora selection to Ghanian diaspora artists, which i think you should, as africa is a huge continent. How will you ensure that you have a representative selection? Is there some sort of popularity index that sorts artists by sales or revenue that you could use to limit your diaspora selection. It would also be nice if this index has a ghanian equivalent. Next you need a methodology to study the artistic expression itself. You can use live concerts, or you can simply look at musical elements. Some of these may have changed because of availbility (no dancers/mucians in the same african tradition, and others may have changed for finacial reasons. And some by chance meetings) And then there is the artistic choice/preference of the artist, which you can only acertain by asking or checking interviews. What I mean is that studying expressions will not reveal motives or causes.
But let us for a moment assume that you are unable to find a diaspora equivalent of ghanian music, there simply aren't enough. Could you not expand the original group as well. And examine hypetheses like: 80% of african artists using traditional african drummers in their music in ghana, switch to electronic drum machines in the US. ..Well, i did my best :)