In the episode "Watch the Skies (Episode)", when General Klump and Diddy Kong are explaining to King K. Rool about the spinning UFO they just saw, K. Rool sings "Watch the Skies".
K. ROOL:
The aliens are planning their deadly invasion
They're armed with ray guns and mind-melting powers
Who knows what evil we can expect
Prepare yourself for a horrific encounter
In every monkey's life
Comes a time when you should stand up and fight (Watch the skies)
If you want some self-respect
Then get ready and watch the skies (Watch the skies)
There's only one chance to stop these invaders
You could turn them back with the coconut's power
Get the crystal and you go down in history
This could be Diddy's finest hour!
You could be the hero
There's a brilliant light that shines from your eyes (Watch the skies)
Aren't you sick of being a zero?
Just look up and watch the skies (Watch the skies)
It's up to you to watch the skies!