I really want a Sim to play a particular song on the piano to make my La La Land themed plotline complete, but I have no idea how. I've learned how to import custom music normally, but as far as changing the songs the sims can play on the piano, I have not made any progress. Little help? Or is this just too difficult.

(Also, if anyone has a Sim that actually looks like Ryan Gosling that would be a great bonus XD I have yet to find one for the Sims 3!)