Even if you don’t know the difference between Bach and Beethoven, chances are you probably know who Yo-Yo Ma is. From his appearances on Sesame Street to his interviews with Steven Colbert, Mr. Ma’s presence outside the concert hall has made him a household name. In the classical music world, he’s the equivalent of a rock star. He has composed over 70 albums, 15 of which have won Grammies. He has also performed at major events throughout the world, such as the one-year anniversary of 9/11 and President Obama’s first inauguration. His cello is also said to be worth around $2.5 million, so don’t expect him to smash it over his knee once he finishes one of Bach’s fugues.