Kacey Musgraves is the first person to ever high-five a member of the royal family in public

Does it count as breaking the rules when you aren't even sure of the rules to begin with?

That might be a question that country singer Kacey Musgraves has been asking herself for the past several years, ever since she became the first person to high-five a member of the British royal family in public back in 2015.

During the 2015 Royal Variety Hour at Royal Albert Hall in London, Musgraves had the pleasure of meeting Prince Harry and, not sure what to do, she high-fived him instead of the usual handshake or small curtsy.

After the hilarious interaction, Musgraves posted a photo of their high-five on Instagram with the caption "When Texas meets Royalty. #casual #highfives #idontknowtherules #politicallyFUNcorrect"

In a new interview with the BBC, the "Pageant Material" singer explained how she decided to give Prince Harry a high-five.

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LONDON, ENGLAND - MARCH 08: Country singer Kacey Musgraves meets her Spotify Premium fans at London's historic Spencer House on March 8, 2018 in London, England. (Photo by Chris J Ratcliffe/Getty Images for Spotify)
THE TONIGHT SHOW STARRING JIMMY FALLON -- Episode 0821 -- Pictured: Singer Kacey Musgraves performs 'Space Cowboy' on February 26, 2018 -- (Photo by: Andrew Lipovsky/NBC/NBCU Photo Bank via Getty Images)
NEW YORK, NY - JANUARY 27: Kacey Musgraves attends the Clive Davis and Recording Academy Pre-GRAMMY Gala and GRAMMY Salute to Industry Icons Honoring Jay-Z on January 27, 2018 in New York City. (Photo by Lester Cohen/Getty Images for NARAS)
NEW YORK, NY - JANUARY 27: Musician Kacey Musgraves attends Sir Lucian Grainge�s 2018 Artist Showcase presented by Citi with support from Remy Martin on January 27, 2018 in New York City. (Photo by Dia Dipasupil/Getty Images for Universal Music Group)
NEW YORK, NY - JANUARY 27: Musician Kacey Musgraves attends Sir Lucian Grainge�s 2018 Artist Showcase presented by Citi with support from Remy Martin on January 27, 2018 in New York City. (Photo by Lester Cohen/Getty Images for Universal Music Group)
THE TONIGHT SHOW STARRING JIMMY FALLON -- Episode 0741 -- Pictured: Musical Guest Kacey Musgraves performs 'Drinkin' Problem/Merry Go Round/Don't Bring Me Down' on September 20, 2017 -- (Photo by: Andrew Lipovsky/NBC/NBCU Photo Bank via Getty Images)
NASHVILLE, TN - AUGUST 22: Peggy Lynn, Brandy Clark, Kacey Musgraves, Patsy Lynn Russell, and Margo Price attend the new exhibition Loretta Lynn: Blue Kentucky Girl at Country Music Hall of Fame and Museum on August 22, 2017 in Nashville, Tennessee. (Photo by Rick Diamond/Getty Images for Country Music Hall Of Fame & Museum)
AUSTIN, TX - JULY 04: Singer-songwriter Kacey Musgraves performs onstage during the 44th Annual Willie Nelson 4th of July Picnic at Austin360 Amphitheater on July 4, 2017 in Austin, Texas. (Photo by Rick Kern/WireImage)
LAS VEGAS, NV - APRIL 02: Recording artist Kacey Musgraves arrives at the 52nd Academy Of Country Music Awards on April 2, 2017 in Las Vegas, Nevada. (Photo by Allen Berezovsky/WireImage for Fashion Media )
LAS VEGAS, NV - APRIL 02: Recording artist Kacey Musgraves attends the 52nd Academy Of Country Music Awards at Toshiba Plaza on April 2, 2017 in Las Vegas, Nevada. (Photo by Kevin Mazur/ACMA2017/Getty Images for ACM)
THE TONIGHT SHOW STARRING JIMMY FALLON -- Episode 0582 -- Pictured: Musical guest Kacey Musgraves performs on December 01, 2016 -- (Photo by: Andrew Lipovsky/NBC/NBCU Photo Bank via Getty Images)
NEW YORK, NY - NOVEMBER 30: Musician Kacey Musgraves visits at SiriusXM Studio on November 30, 2016 in New York City. (Photo by Matthew Eisman/Getty Images)
NASHVILLE, TN - NOVEMBER 16: Kacey Musgraves perform songs from her Christmas album 'A Very Kacey Christmas' At The SiriusXM Studios In Nashville; Performance To Air On The Highway Channel on November 16, 2016 in Nashville, Tennessee. (Photo by Rick Diamond/Getty Images for SiriusXM)
NASHVILLE, TN - NOVEMBER 08: Singer-songwriter Kacey Musgraves performs on stage during the CMA 2016 Country Christmas on November 8, 2016 in Nashville, Tennessee. (Photo by Rick Diamond/Getty Images)
NASHVILLE, TN - NOVEMBER 02: (L-R) Kacey Musgraves, Reba McEntire, Jennifer Nettles, Karen Fairchild, and Carrie Underwood perform onstage during the 50th annual CMA Awards at the Bridgestone Arena on November 2, 2016 in Nashville, Tennessee. (Photo by Taylor Hill/Getty Images)
NASHVILLE, TN - NOVEMBER 02: Singer-songwriter Kacey Musgraves attends the 50th annual CMA Awards at the Bridgestone Arena on November 2, 2016 in Nashville, Tennessee. (Photo by Taylor Hill/Getty Images)
THE 50th ANNUAL CMA AWARDS - The 50th Annual CMA Awards, hosted by Brad Paisley and Carrie Underwood, broadcasts live from the Bridgestone Arena in Nashville, Wednesday, November 2 (8:00-11:00 p.m. EDT), on the ABC Television Network. (Image Group LA/ABC via Getty Images) KACEY MUSGRAVES
AUSTIN, TX - OCTOBER 02: Singer Kacey Musgraves performs during the Austin City Limits Music Festival at Zilker Park on October 2, 2016 in Austin, Texas. (Photo by Tim Mosenfelder/Getty Images)
AUSTIN, TX - OCTOBER 02: Recording artist Kacey Musgraves is seen in the Samsung Creator's Hub during day 3 at Austin City Limits Music Festival 2016 at Zilker Park on October 2, 2016 in Austin, Texas. (Photo by Sarah Kerver/Getty Images for Samsung)
LOS ANGELES, CA - SEPTEMBER 27: Singer Kacey Musgraves attends All For The Hall Los Angeles A benefit concert presented by The Country Music Hall of Fame And Museum at The Novo by Microsoft on September 27, 2016 in Los Angeles, California. (Photo by Mike Windle/Getty Images for Country Music Hall of Fame and Museum)
FRANKLIN, TN - SEPTEMBER 25: Kacey Musgraves performs on September 25, 2016 in Franklin, Tennessee. (Photo by Erika Goldring/Getty Images for Pilgrimage Music & Cultural Festival)
CHICAGO, IL - JUNE 17: Singer/Songwriter Kacey Musgraves performs during 2016 Windy City LakeShake Country Music Festival - Day 1 at FirstMerit Bank Pavilion at Northerly Island on June 17, 2016 in Chicago, Illinois. (Photo by Rick Diamond/Getty Images)
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"Okay, so I'm from Texas. I haven't read the manual on royal etiquette. I didn't really go to elocution lessons or anything," she explained. "He came up and he just seemed super friendly and I put my hand up and he went for it. We had a laugh. And later, when I came back, the label was like, 'Oh, you shouldn't have done that. That was kind of a no-no.'"

When the hosts told Musgraves that she was the first person to ever high-five a member of the royal family in public, she was in disbelief.

"Surely someone else out there is going for a high-five!" she said with a laugh.

Watch the cute moment below:

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