Mama mia! It's Il Volo and Pia.

Italian teen tenors Il Volo invited 'American Idol' Season 10 alum and balladeer of Italian origin Pia Toscano to perform with them on their PBS special 'Il Volo Takes Flight.' Toscano's big and beautiful voice is the perfect complement for the three boys and their soaring style. These sons and daughters of Italy certainly make their families proud with their voices. It doesn't hurt that Toscano is easy on the eyes. She is as gorgeous as she sounds.

There were a couple of flirtatious moments during the performance, with the boys and Pia singing to another and hugging. They clearly enjoyed themselves by meshing their voices.

In a pop landscape loaded with marginally talented acts that can't really sing without a lot of assistance from studio equipment, the trio and Toscano are refreshing -- thanks to their vocal acrobatic and their mutually timeless and classic styles. The duet is nothing less than stunning.

This performance is "molto bene," which, when translated, means "very good."

Watch Il Volo + Pia Toscano Perform Together