Ok, I did hesitate to link to this clip...it's not 100% clear what the source is, but there seems to be no commercial release. So, crossing my fingers and hoping it isn't dripping with bad karma, I thank the original youtube poster, er, hotazzoperastud, and present to you some formidable music-making, courtesy of Joyce DiDonato and Eric Cutler. p.s. not to be a boring high note queen but check out the B at the end. Srsly.