Chief and Rockapella in “Unfinished Business”

This is Eartha Brute.

(singing) Eartha Brute, huh

Pecs of steel, this gal can tussle and she's got a brain of muscle. Her last known whereabouts: Tokyo, Japan. Sumo wrestling may date back 2,000 years, and early matches were even held in Shinto shrines. The object in sumo is simple: knock your opponent out of the circle or down to the ground. What's not so simple is your opponent could weigh some 500 pounds. That immense weight helps wrestlers keep their balance in a match and it requires a special diet, mainly huge amounts of a high protein stew called Chanko Nabe. Yep, fans love watching their humongous heroes stomp, squat, crash, and collide until one of them is defeated. Or they did until today...

(singing) Ooh!

...when Eartha Brute journeyed to Japan and set her sights on sumo. She waited till the crowds went home, crept back into the arena, then with a mighty heave-ho, she hoisted the sumo ring and hauled it away. Now she's planning a sumo-mania special on pay-per-view. Gumshoes, I'm counting on you to solve today's case...

(singing) Woo-woo-oo-oo

...WRESTLE RUSTLER!