Don't worry, this isn't a shameless self-promotion where she's trying to get a music career going, she's just trying to help people.
Mackenzie lives with Type 1 Diabetes and her song "The Sweetest Treat" was written to help educate kids with Diabetes by giving them some healthy lifestyle tips. What makes it even more awesome is that she's donating a percentage of the profits to Diabetes research.
The song has had some mixed reviews, but whether you'll end up singing the song in the shower or not isn't really the point. The point is to help people and you can't really find anything wrong with that. We love that she put herself out there and is using her experience and knowledge to help other people.