Yes, that Pharrell Williams. This is simply the words to his number one hit song of the same title, which was the best-selling song of 2015 in the USA and sold some fourteen million copied worldwide. Personally, I'm not a fan of it, but you cannot deny his success, not just with this song but with a host of others he released under his own name and which have been recorded by others.
This book takes the lyric and illustrates it with pictures of real kids of diverse ethnicity, having fun against brightly colored backgrounds, so it's an inspiring and fun book with a very light touch and I recommend it for a fun read that can lead to a number of activities, such as dress-up, dancing, and otherwise exercising. I also recommend it because it's not a common thing to have a children's book based on the lyric of an adult-oriented performer, so it's interesting for that, too!