Late Night Opera in a Piazza in Florence

A magical night in Firenze (Florence), Italy during my birthday trip 2 weeks ago. After dinner whilst cycling back to the hotel, we heard the distant sounds of opera coming from the Piazza della Republica. We discovered a young lady singing in the middle of the piazza. . it was simply beautiful. ps If anyone can tell me the names of the two songs she sings (in this video and the other one), that would be much appreciated br, br,