Guess who’s been topping the charts in the iTunes classical section — The Piano Guys. I can’t be the only one that picked up my phone and frantically googled when I found out that The Piano Guys would be playing Trump’s inauguration. I didn’t know who they were, but with millions of YouTube hits and the word “piano” in the name, I was intrigued. I watched the dramatic music video for “Beethoven’s 5 Secrets” — a mash-up of OneRepublic’s brief hit and Ludwig’s famed fifth symphony — and understood the appeal. Classical music, packaged for easy listening.