And she sang through the famous aria as the maid came in again.

Onstage, the beleaguered chorus sings the uncharacteristically sappy number that precedes Angelique's most famous aria.

The robot conducted three of the 18 pieces performed on Tuesday night, including the famous aria La Donna e' Mobile, from Verdi's opera Rigoletto.

But all Sing can hear is the five-chord introduction to Angelique's most famous aria, played not by a string section, but on a piano.