Hunter Hayes, Kelly Clarkson and Zac Brown Band have joined the impressive list of country stars who will be participating in Sunday night’s GRAMMY Awards. Three-time nominee Hunter will present, as will Keith Urban, Tim McGraw and Faith Hill. Kelly Clarkson joins Miranda Lambert and Dierks Bentley, Carrie Underwood and Taylor Swift as performers. And Zac Brown will team up with Elton John, Mumford & Sons, Mavis Staples and Brittany Howard from Alabama Shakes to help pay tribute to the late Levon Helm during the Memoriam portion of the show. The GRAMMYs will air live on CBS this Sunday at 8pm ET/7pm CT.