Topic modelling, word embedding of different types of lyrics

So far I have been working on two projects and their corresponding research question are as follows. Furthermore details of respective projects can be accessed through the subrepository.

Research Question: Through the analysis of LDA model trained by Christian Music lyrics, how have topics/words of Christian music changed over time?

Research Question: What is the correlation between the 'creativity' of song lyric and popularity of a K-pop song? If not what are the factors that affect the success of a song?