Roberto Frontali (& Placido Domingo) - Adriana Lecouvreur (2009) - "Ecco il monologo" 

Baritone Roberto Frontali sings Michonnet's first act aria "Ecco il monologo" from a February 2009 performance of the Cilea opera Adriana Lecouvreur (with the rest of the scene included). After the aria, 68-year-old tenor Placido Domingo and (briefly) soprano Maria Guleghina appear as Maurizio and Adriana, respectively. Unfortunately, someone's head blocks Frontali from view for a bit at the beginning, but he comes into view before too long. It might be better to watch full screen to see better.
This is a continuation of the clip:
• Placido Domingo - Adri...