I will be on that ship in less than 3 weeks, and from the carnival capers that I have been reading, it has a piano bar, karaoke, motown music was mentioned, along with 50's & 60's music, and the beatles. I did not read anything about Rap...but I can let you know for sure in a few weeks. However, you might be needing to know sooner if this is one of the ships that you are looking to make a change to due to your itinerary change.
I know I am very much looking forward to this ship, it is a sister ship to the Valor, and I loved that one too!
I will try and find that post to the capers, and maybe you can do some research on your own.