**FILE** Country star Faith Hill performs at "ACM Presents: Tim McGraw's Superstar Summer Night" at the MGM Grand Garden Arena in Las Vegas on April 8, 2013. (Associated Press/Invision)
**FILE** Country star Faith Hill performs at "ACM Presents: Tim McGraw's Superstar Summer Night" at the MGM Grand Garden Arena in Las Vegas on April 8, 2013. (Associated Press/Invision)
Artists, from left, from left, Dave Haywood, Hillary Scott, Charles Kelley, Blake Shelton, Willie Nelson, Faith Hill and Tim McGraw perform during a tribute to Willie Nelson at the 46th Annual Country Music Awards at the Bridgestone Arena on Thursday, Nov. 1, 2012, in Nashville, Tenn. (Photo by Wade Payne/Invision/AP)
Tim McGraw, left, and Faith Hill arrive at the 46th Annual Country Music Awards at the Bridgestone Arena on Thursday, Nov. 1, 2012, in Nashville, Tenn. (Photo by Chris Pizzello/Invision/AP)
Starting Dec. 7, Tim McGraw and Faith Hill will do a 10-weekend run of shows in Las Vegas, the first time in six years they will perform together in the U.S. (Associated Press)
Starting Dec. 7, Tim McGraw and Faith Hill will do a 10-weekend run of shows in Las Vegas, the first time in six years they will perform together in the U.S. (Associated Press)
FILE - In a Jan. 22, 2009 file photo, singer Chrissie Hynde, lead singer of the Pretenders, pauses during rehearsals at John Henry's Studio in north London. The biggest clash of fans might just happen the night before the Super Bowl when The Pretenders and Faith Hill perform together live from Grand Prairie, Texas. (AP Photo/Joel Ryan, File)
