Tom Huizenga

Anthony Roth Costanzo is a feisty performer who knows a thing or two about busting down barriers in classical music. After all, opera singers don't normally belt out arias behind office desks, and they don't insist on lugging harpsichords with them. They also don't routinely sing in Bronx middle school classrooms and get students talking about emotions. But Costanzo is fearless. (And after seeing this amazing Tiny Desk performance, watch him melt the hearts of distracted sixth-graders.)

When George Li, the 23-year-old American pianist, revealed his Tiny Desk setlist, one thought came to mind: How will these powerhouse showstoppers sound on an upright piano? The music he intended to play, by Franz Liszt and Vladimir Horowitz, was designed for a real, 7-foot concert grand piano – the kind they used to call "a symphony orchestra in a box."

Renée Fleming is becoming America's go-to singer. The celebrated soprano, who has performed at a broad range of high-profile events off the opera stage, is scheduled to sing at Senator John McCain's memorial service this Saturday at Washington's National Cathedral.

Fleming is slated to sing the Irish standard "Danny Boy" — at McCain's request — alongside tributes to the late Senator by Presidents Barack Obama and George W. Bush, and a homily by Bay Area Catholic leader Father Edward A. Reese.

Jamie Bernstein can't call her childhood a typical one. On any given weekend, she might find Lauren Bacall, Isaac Stern, Richard Avedon, Mike Nichols, Stephen Sondheim, Lillian Hellman or Sidney Lumet hanging out at her house. Jamie's father was Leonard Bernstein.

There has never been an American dynamo remotely like Leonard Bernstein. The composer, conductor, pianist, creator of musicals, educator, political maven and raconteur seemed to spin on his axis faster than any normal human being.

The Royal Concertgebouw Orchestra of Amsterdam, considered one of the world's top orchestras, has fired its conductor, Daniele Gatti, after two women publicly accused him of sexual misconduct. A statement published Thursday on the orchestra's website notes that it has "terminated the cooperation with chief conductor Daniele Gatti with immediate effect."

Pages