Rehearsals for the 46th annual Academy of Country Music Awards are in full swing over at the MGM Grand in Las Vegas. Blake Shelton, armed with a guitar and a goofy grin (as seen in these pictures), was there to ensure that everything goes smoothly for the live show on April 3. Shelton will be playing co-host at this year's ACMs, alongside seasoned host Reba McEntire.

Not only that, he is set to perform -- and the 'Hillbilly Bone' hitmaker might just take home the Top Male Vocalist of the Year award. The ACM Awards air this Sunday, April 3, on CBS, but in the meantime, get a sneak peek at the show thanks to some rehearsal pictures.