The three-hour special will feature more than 25 performances from past CMA Fests, including those by Darius Rucker, Carrie Underwood and Tim McGraw.
Beginning Friday, SiriusXM’s “StagecouchWeekend” will broadcast exclusive at-home performances from country music’s biggest stars.
At present, the stars' s residency at the Zappo's Theater at the Planet Hollywood Resort & Casino is scheduled to resume in August and run through December.
Shania sat outside her stable and shared her acoustic cameo with her blonde horse and her dog.
The clip was filmed in a dank Nashville basement and in the desert mountains near Lancaster, California.
Shania Twain opened the door for a range of female country singers, with some joining her pop-rock crossover, while others are going the traditional route.
The country superstar was presented with discs for the platinum album and four certified singles from it.
"It’s hard to imagine topping what we have accomplished together," she said of her 12 years in the role.
The event, hosted by Carrie Underwood, Reba McEntire and Dolly Parton, saw Garth Brooks win the showpiece Entertainer of the Year award.
The Mercury Nashville release is the latest single by the platinum-selling act.
“He was an extraordinary human being whose generosity, spirituality and humour inspired everyone around him.”
A tribute to the famed Nashville institution that's as old as what we call country music itself.
The song is a contemporary take on the traditional Nashville barroom ballad, with powerful lead and harmony vocals, lead guitar and pedal steel.
The CMAs will be broadcast on ABC from Nashville’s Bridgestone Arena on 13 November.
Running from 3 September to 31 October, it will feature two dozen of the country superstar's wardrobe items, worn on the Opry and at the Ryman Auditorium.