Blake Shelton credits 'The Voice' with expanding his musical talents.  Perhaps it's a two way street.  Former Voice Judge, Usher may have picked up some country flavor from sitting next to Blake.  Watch as he covers Blake's hit, 'Neon Light.'  And Blake covers Usher's "Yeah."

Both performances were part of fundraising events.  Usher's performance was at a United Way fund raiser in Dallas.  Blake's performance was for the Oklahoma Tornado Relief efforts from 2013.

Usher may have won the face off.  His rendition of 'Neon Light' may have turned out better than Blake's hillbilly version of 'Yeah'.  Check out both videos below and decide who you think won.