This example is The Anvil Chorus from Verdi's superb Il Trovatore. The scene is dawn in a gypsy camp, and the men begin their day's work as they sing of the merits of hard work, good wine and their fine gypsy women. You've heard the chorus in commercials and films all your life, and now you know where it comes from.
Verdi can be ponderous, but Il Trovatore (The Troubadours) is sublime, and contains my personal favorite crazed heifer aria, Stride la Vampa, sung by unfortunate Azucena.
Here Viorica Cortez spanks this aria (1975) and puts it to bed without any supper. It's an acquired taste, but it's a good kind of crazy, if you ask me. The clip is not her full scene, but you get the ideer anyway.
Notice how you don't see her singing - none of that Whitney Houston/pop music chin-wobbling antics-- proper (and healthy) voice production happens on the interior.