A Flock of Fiordiligis– Malin Haretlius, Dorothea Röschmann, and Gundula Janowitz

Adriana Ferrarese del Bene
the First Fiordiligi

In her Act 1 aria, Come scoglio, Fiordiligi is adamant that none shall sway her from her beloved. Everyone else seems to be used to her overly dramatic behavior. In the first two clips below, her outburst is taken in stride by her sister, her lovers, Alfonso, and Despina.

This aria is considered to be a parody of Opera seria. Mozart is sending up the overly dramatic statements of that old form that he knew so well. Some productions of Cosi fan tutte play up the parody, pushing the action over the top.

In others, one senses that the soprano singing Fiordiligi is treating the emotion completely seriously–sometimes a funny situation is funnier if it's clear that the character is dead serious.  

Sunday Brunch – Sull' Aria from the Marriage of Figaro

Not Regie (not particularly "historically informed" either, but soooo lovely.)  

Classic performance by classic sopranos of a classic duet from a classic opera. 
Mozart Heaven!

Lucia Popp and Gundula Janowitz

Le Nozze di Figaro: Sull' Aria