Bobby McFerrin is the singer who made Don’t Worry, be Happy famous. Here is a video that Mr. McFerrin "demonstrated the power of the pentatonic scale." Please watch the video.
World Science Festival (2018, August 3). Bobby McFerrin Demonstrates the Power of the Pentatonic Scale. [Video]. YouTube. https://www.youtube.com/watch?v=ne6tB2KiZuk