They're part of an initial lineup that also includes George Strait, Miranda Lambert, Hunter Hayes, The Band Perry, and Kelly Clarkson.
Hayes and Lambert are among the top nominees heading into the ceremony. Hunter is up for six awards, while Miranda could take home five trophies -- including Entertainer of the Year. Shelton, Bryan, Clarkson, and The Band Perry are also nominees.
The 48th annual ACM Awards will take place at the MGM Grand Garden Arena in Las Vegas, and air live on CBS on April 7th.
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