Dueting It To Country Songs: Brett Eldredge and Old Dominion have been added to the lineup for the 52nd Academy of Country Music Awards, which also features an unprecedented number of duets and collaborations. Reba McEntire will be joined by contemporary Christian artist Lauren Daigle for "Back to God," Tim McGraw and Faith Hill bring the television premiere of "Speak to a Girl," Thomas Rhett and Maren Morris will perform "Craving You," Cole Swindell and Dierks Bentley will share "Flatliner," Carrie Underwood and Keith Urban will sing "The Fighter" and the Backstreet Boys will join Florida Georgia Line for a medley. The show airs live from Las Vegas Sunday, April 2 at 8pm ET/delayed PT on CBS-TV.