Songs that are arranged in a way that provides alternating lines of six and eight syllables each are known to be arrange by the "Common Meter"...

Good examples of this are Amazing Grace, The Pokemon Theme, House of the Rising Sun, Yellow Rose of Texas... And Gilligan's Island Theme Song...

A good example is this Youtube video that gives several subtitles and musical samples..
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Click through to enable Subtitles if they don't show here...

Education is fun! You'll never be able to sing Amazing Grace again without thinking of Gilligan's Island.

[This message has been edited by Synthesis (edited 02-01-2013).]

Interesting.

Ok. That's kinda freaking me out a little, especially when I'm singing Amazing Grace to either Gilligans Island or the Pokeman song.

Hahaha.. I didn't read the information and watched the entire video without subtitles. I thought they were going to mix and match it up there on the video.

I knew a lot of songs were interchangeable like this, and have always subconsciously noticed the "Common Meter" but never had a name for it. Very cool, thanks.