Christina Grimmie's Brother Pays Tribute to His 'Superstar' Sister
![Christina Grimmie's Brother Pays Tribute to His 'Superstar' Sister](http://www.billboard.com/files/styles/promo_225/public/media/Christina-Grimmie-may-2016-billboard-1548.jpg)
Marcus Grimmie, brother to the late Christina Grimmie, has shared a note in remembrance of his sister. In the touching letter posted to Facebook...
Marcus Grimmie, brother to the late Christina Grimmie, has shared a note in remembrance of his sister. In the touching letter posted to Facebook...