"Evolution" is sung by Dr. Gross in the episode "Preboot." The song is about the hybrids that Dr. Gross has kept in her menagerie. It is the final song of Season 7.
| Dr. Gross: Evolution's a natural process,|
But it's not exactly the fastest.
You can reach your potential with just a little help.
Get some light surgery and shake off the anesthesia,
| And you'll see that science has made you more special,|
With just a little help.
Step into my menagerie,
One look at my lab and you'll see,
| The opposite of extinction, nature leveled up.|
Finn: [talking] Wow, these dudes look mad advanced.
Jake: [talking] They're mash ups, bro.
Dr. Gross: A shark that breathes air and likes to eat cheese,
| Susan: [gasps]|
Dr. Gross: A really fast chick with wasp wings.
Jake: [talking] Click!
Dr. Gross: An electric eel powered by wind,
| When it's dark, that eel's ideal.|
And one of my best hybrids, a guy that knows what time it is.
- This song is likely a homage to Gene Wilder's "Pure Imagination" from the 1971 movie, Willy Wonka and the Chocolate Factory.
- http://kingofooo.tumblr.com/post/153570877354/sennwald-this-is-the-demo-i-made-for-preboot-it (Demo)