Watch Ariana Grande Cover Justin Bieber's 'What Do You Mean?' in Concert
![Watch Ariana Grande Cover Justin Bieber's 'What Do You Mean?' in Concert](http://www.billboard.com/files/styles/promo_225/public/media/ariana-grande-cat-ears-performance-2015-billboard-650.jpg)
Ariana Grande made thousands of concert-goers very happy with a cover of Justin Bieber’s massive hit “What Do You Mean” at the Houston Toyota Center...
Ariana Grande made thousands of concert-goers very happy with a cover of Justin Bieber’s massive hit “What Do You Mean” at the Houston Toyota Center...