The 2018 ACM Awards are almost here! And this year, two of the most exciting categories -- Male Vocalist of the Year and Female Vocalist of the Year -- are full of extremely talented contenders: Chris Stapleton, Miranda Lambert, Reba McEntire, Thomas Rhett, Carrie Underwood, Keith Urban and more.

As we wait for the big night, it's fun to look back at past winners. Since the ACMs have been around since 1966, there are 52 past Male and Female Vocalist of the Year winners -- some with multiple trophies in the category. Click through the photo gallery above to see all of them ... and then tune into the 2018 ACM Awards to find out who will be each category's 53rd winner.

The 2018 ACM Awards are set to take place in Las Vegas, Nev., on April 15, and air live on CBS beginning at 8PM ET. The ceremony will take place at the MGM Grand Garden Arena.

The Boot will be staying up late covering the most buzzed-about winners, fashion and moments at the 2018 ACM Awards. Readers can watch along with us by checking back to TheBoot.com for the latest ACMs headlines, liking The Boot on Facebook and following The Boot on Twitter.

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