I was very happy to find this gem today (and hopefully it stays up a while). I've been a huge fan of Antonio Caldara ever since that epic recording of his "Maddalena ai piedi di Cristo" with favourite soprano in the whole world Maria Cristina Kiehr, super-star counter-tenor Andreas Scholl and Gerd Turk from Cantus Koln (one of my favorite ensembles).
Hana Blazikova is a new find for me, but boy am I glad I stumbled upon her. Her singing is nothing short of fantastic, and as a bonus she's Czech which speaks to my half-Czech heart. :) But I truly love her version of Madelena, a more timbre version of Kiehr, more edgy, softer vibrato, and a rather clean ornamentation which I prefer. I wish I could find out more about who's playing and what event it is, though, but until I figure it out, let's make no mistake;
This video is amazing. I hope you enjoy it, too.