Many on the ad’s YouTube page have pointed out that, for better or worse, the song sounds a lot like Pharrell Williams:
They are not wrong.
However, it’s not like Pharrell’s “happy” sound is entirely original, either. Much like Bruno Mars and Raphael Saadiq, Pharrell is skillfully reviving the effervescent style of early ’60s soul that artists like Little Stevie Wonder held in their fingertips:
You cannot copyright style.