Tom Huizenga

Until recently, most classical music videos have been humdrum affairs. Musicians, in concert attire, earnestly produce their notes with eyes closed and heads tilted in a beatific expression, somewhere between a migraine and an attempt to channel Bach from the heavens.

Magos Herrera is a jazz singer from Mexico, but she has also sung pop songs with Brazilian beats and crooned Mexican classics with a touch of rock. Herrera takes another adventuresome step on her new album, Dreamers, where she partners with a classical string quartet for an album steeped in Latin American culture. The potent mix of themes and the sound of the string quartet, plus a little percussion, are compelling.

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.