Watch FilmoFlix. Recorded at Germany's Mainz Cathedral, this inspirational concert video features the glorious voice of opera star Renee Fleming, who's regarded as "the gold standard of soprano sound." With maestro Trevor Pinnock conducting, Fleming performs "Ave Maria," "Laudate Dominum" (from Wolfgang Amadeus Mozart's Mass in C minor), "Adeste Fidelis," "Rejoice Greatly" (from George Frideric Handel's oratorio "Messiah") and "O Holy Night."