They are singing in Doric, the Aberdonian sub-language. It became a sublanguage instead of a dialect when I was up there and great was the celebrations and excitement in the linguistics department. It's a blend of english and scots -

Gin I war where the Gaudie runs
I was born where the (river) Gaudie runs

and is about a woman who was courted by three men, two of whom die in the course of the story. She marries the third and no one finds anything even remotely suspicion in the deaths of the other two.

Best line is
Ain' was kilt at the Laurum Fair
The ither was drownt in the Dee.

(one was killed at the Laurum Fair, the other was drowned in the Dee.)

That is the Dorric lesson for today. :)