so I have no credentials for what I'm saying but from what I have READ and what I have heard in advice columns on college admissions websites and personally from Quest/GM Scholars is that you shouldn't submit supplemental materials unless it reveals something about you that the rest of your application won't.
I think it really depends on the rest of your application, but I would most likely go with the additional letter of rec. Again, I don't have authority on this subject matter but I actually find the talk show thing really interesting! And also, I know TONS of people who've played piano for like 10+ years and if you're not looking to major in music I don't know if that's the best thing to go with.
Best of luck!