Idina Menzel lends her voice to the title anthem for her new children's book, The Loud Mouse Song, in the above new video. Menzel co-wrote the picture book with her sister Cara Lee.

Disney Publishing Worldwide will release the book about Dee, "a little mouse finding her big voice," September 27 to "inspire everyone to be their authentic self." Dee loves a lot of things, but she especially loves to sing: during yoga, while practicing math. But, the little mouse mostly sings for herself, and it's not until her teacher asks everyone to share something with the class that Dee sings in front of them for the first time. 

Illustrations for the book are by Jaclyn Sinquett. The book is currently available for preorder.

The Wicked Tony winner has also appeared on Broadway in If/Then, Hair, Funny Girl, Aida, and Rent.