This is a song from StoryBots: Learn to Read Collection 1. It's sung by Gabe Sokoloff.
Lyrics[]
Have you heard of the bossiest letter around?
When he follows a vowel, he changes its sound
You see him in for and in fur and in far,
The letter they call bossy R
When he bosses a vowel, a cat becomes cart
A spot is a sport, even at becomes art
With E, I, and U, he can make the sound /ər/
In fern and in turn and in sir
Yo ho, he sails to the port
A shot from his cannon will always be short
With a bird on his shoulder, he sails by a star
The letter they call bossy R
In the morning at breakfast, he sits at the stern
He orders a bun that's so hot it will burn
He sails in a storm when the sky is all dark
And he's never afraid of a shark
Yo ho, he sails all around
Bossing the vowels and changing their sounds
He's bossy in shirt and in fort and guitar
The letter they call bossy R
The letter they call bossy R