When country's power couple Tim McGraw and Faith Hill confirmed that they'll play a surprise show on Tuesday (Oct. 4) at Nashville’s iconic Ryman Auditorium, fans went nuts. It’s the first time the duo has performed a concert there together, and tickets sold out in minutes.

Fans began speculating last week, when the Ryman listed a show on its website under the unheard-of duo name “Sam and Audrey.” Shrewd observers will know these are McGraw and Hill's real first names, so suspicions were high that the country superstars would be the ones taking the stage.

Just before the tickets went on sale at 10AM CT on Monday morning (Oct. 3), they officially confirmed their identities on the Bobby Bones show, as well as Twitter, and fans were ready. According to a news release, traffic on the Ryman ticketing website was four times the usual rate, as was the line at the physical box office in downtown Nashville.

The couple will celebrate 20 years married this week on Oct. 6, so it makes sense that they’d want to do something special for the occasion (Though they did just go on vacation together, which was made clear through social media — McGraw & Hill shared several flirty photos from their tropical getaway).

If there’s one pair who knows how to keep the spark alive, it’s these two. McGraw admits it’s not easy, but he says the secret to 20 years of marriage is actually to “listen!” He does have a lot of voices to contend with, though, having three daughters as well, the second of whom just went off to college.

See Pics From Tim & Faith's Sexy Vacation

Tim + Faith Share Flirty Photos