Stars of country music gather for a night of harmony

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Garth Brooks accepts the award for entertainer of the year at the 51st annual CMA Awards in Nashville, Tenn. (Photo by Chris Pizzello/Invision/AP)

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Keith Urban performs at the 51st annual CMA Awards in Nashville, Tenn. (Photo by Chris Pizzello/Invision/AP)

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T.J. Osborne, of Brothers Osborne, performs at the 51st annual CMA Awards in Nashville, Tenn. (Photo by Chris Pizzello/Invision/AP)

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Brad Paisley, left, and Kane Brown perform “Heaven South” at the 51st annual CMA Awards in Nashville, Tenn. (Photo by Chris Pizzello/Invision/AP)

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Faith Hill, left, and Tim McGraw perform “The Rest of Our Life” at the 51st annual CMA Awards in Nashville, Tenn. (Photo by Chris Pizzello/Invision/AP)

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Garth Brooks, left, performs “Ask Me How I Know” at the 51st annual CMA Awards in Nashville, Tenn. (Photo by Chris Pizzello/Invision/AP)

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Maren Morris, left, and Niall Horan perform at the 51st annual CMA Awards in Nashville, Tenn. (Photo by Chris Pizzello/Invision/AP)

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Miranda Lambert accepts the award for female vocalist of the year at the 51st annual CMA Awards in Nashville, Tenn. (Photo by Chris Pizzello/Invision/AP)

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Keith Urban accepts the award for single of the year for “Blue Ain’t Your Color” at the 51st annual CMA Awards in Nashville, Tenn. (Photo by Chris Pizzello/Invision/AP)

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T.J., left, and John Osborne of the Brothers Osborne pose in the press room with their awards for vocal duo of the year and music video of the year at the 51st annual CMA Awards in Nashville, Tenn. (Photo by Evan Agostini/Invision/AP)

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Tim McGraw, from left, Brad Paisley, Carrie Underwood and Faith Hill appear at the 51st annual CMA Awards in Nashville, Tenn. (Photo by Chris Pizzello/Invision/AP)

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Chris Stapleton accepts the award for male vocalist of the year at the 51st annual CMA Awards in Nashville, Tenn. (Photo by Chris Pizzello/Invision/AP)

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Carrie Underwood performs “Softly and Tenderly” during an In Memoriam tribute at the 51st annual CMA Awards in Nashville, Tenn. (Photo by Chris Pizzello/Invision/AP)

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Little Big Town, from left, Jimi Westbrook, Karen Fairchild, Kimberly Schlapman and Phillip Sweet pose in the press room with the award for vocal group of the year at the 51st annual CMA Awards in Nashville, Tenn. (Photo by Evan Agostini/Invision/AP)

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Carrie Underwood pauses during an emotional performance of “Softly and Tenderly” during an In Memoriam as victims of the Route 91 Harvest mass shooting are displayed. (Photo by Chris Pizzello/Invision/AP)

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Reba McEntire, left, and Kelsea Ballerini perform “Legends” at the 51st annual CMA Awards in Nashville, Tenn. (Photo by Chris Pizzello/Invision/AP)

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Alan Jackson performs “Chasin’ That Neon Rainbow” at the 51st annual CMA Awards in Nashville, Tenn. (Photo by Chris Pizzello/Invision/AP)

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Musician Garth Brooks poses in the press room with the award for entertainer of the year at the 51st annual CMA Awards at the Bridgestone Arena on Wednesday, Nov. 8, 2017, in Nashville, Tenn. (Photo by Evan Agostini/Invision/AP)

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Dustin Lynch, from left, Lea Michele, and Brett Eldredge present the award for vocal group of the year at the 51st annual CMA Awards in Nashville, Tenn. (Photo by Chris Pizzello/Invision/AP)

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The 51st annual CMA Awards are held at the Bridgestone Arena in Nashville, Tenn., on Wednesday. (Photo by Chris Pizzello/Invision/AP)

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Hosts Brad Paisley, left, and Carrie Underwood wear eclipse glasses during the 51st annual CMA Awards in Nashville, Tenn. (Photo by Chris Pizzello/Invision/AP)

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Eddie Montgomery performs “My Town” at the 51st annual CMA Awards in Nashville, Tenn. (Photo by Chris Pizzello/Invision/AP)