I initially had "I Love The Flowers" (aka "I Love The Mountains" or "Boomdiada," etc.) on my list of rounds two posts ago. But then I realized it wasn't one - it's not sung in a chain reaction with an unlimited number of groups able to take part.
No, it belongs to a unique subgroup of songs in which the singers at some point split into two halves, each singing something different. In this case, the verse and chorus are sung once through by all, then one half repeats the "boomdiada" refrain while the other signs the verse. Then the two sides reverse roles and finish the song.
Here is an example from Sweden:
I previously posted twice about the use of the song in Discovery Channel promos:
Now, when looking for performances or other info online, it's amazing to see how many people now know this not as a camp or school song, but as 'that Discovery song." The power of television advertising.
It's been hard tracking down the origins of the lyrics. But the music almost certainly was modeled after Hoagy Carmichael's tin pan alley classic of 1939, "Heart and Soul," which has been recorded many times in many genres and is a famously easy two-person piano piece. See the two following videos to see what I mean.