The Academy of Country Music announced today that Kenny Chesney and Tim McGraw will be just one of the surprises they have in store for you when Sunday night’s awards show takes place on CBS.

In addition to the “Brothers of the Sun”, Blake Shelton will team up with Lionel Richie, Rascal Flatts with Steve Martin, and Toby Keith are set to perform a “variety of special duets and collaborations” at the show, set to air at 7pm.

What Kenny and Tim have in store will be the real surprise, but we do know that Blake and Lionel will perform “You Are”, the classic Richie tune, and Rascal Flatts will team up with Steve Martin on “Banjo”. Oh, and let’s not forget Toby Keith, who will take the stage for a very special performance of “Red Solo Cup” with a few of his friends.

See the full list of 2012 ACM Award nominees, and read profiles of 2012 nominees.

Watch the Academy of Country Music Awards live on Sunday, April 1 at 8pm ET (delayed PT) on CBS.

- Steve Koscik, WUSN/Chicago