Blake Shelton's team kicked off week two of 's season 20 Battle Rounds with an impressive matchup!The longtime coach pitted singers Cam Anthony and Emma Caroline against one another for a performance of Dan + Shay's «10,000 Hours.» And not only did the two have to work out the logistics and harmonies of their duet — they had to do it in front of this season's Team Blake mentors, Dan + Shay themselves!Thankfully, the pair pulled off a soaring rendition of the track, with harmonies that wowed all