Christina Aguilera and Demi Lovato Had a Deafening Diva-Off at the BBMAs

Are your windows braced? Have you adjusted the volume on your device? Did you remember to borrow your grandparent's hearing aids? Then you might just be prepared for the vocal earthquake that was the live debut of Christina Aguilera and Demi Lovato's new duet "Fall in Line" at the Billboard ... More