EXCLUSIVE: Fifth Harmony Goes Country at CMT Music Awards, Gushes Over Duet With Cam: 'She's So Incredibly Tal

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This year's CMT Music Awards featured some seriously impressive mashup duets, but it may have been Fifth Harmony's performance with country star Cam that really stole the show at the Bridgestone Arena in Nashville, Tennessee on Wednesday.

With the girls of Fifth Harmony rocking skin-tight, fiery red dresses, while Cam stunned in a black and white jumpsuit with a yellow cape, the powerhouse team burned up the stage with a mashup of Fifth Harmony's megahit "Work From Home," with Cam's latest single, "Mayday."

WATCH: Fifth Harmony Will Explore 'Love' and 'Heartbreak' of the Last Year on New Album

Before the show kicked off, Fifth Harmony stopped to talk with ET's Sophie Schillaci on the red carpet, and they opened up about their "exciting" duet with the breakout songstress.

"I think that she's incredible and she is such a talented country artist," 5H member Camila Cabello gushed. "I think that we're all women in music, you know, genres aren't really a barrier for us. So it's amazing that we can come together and be here, and it's an honor to be here."

For Cam, the CMT Music Awards are another milestone on her meteoric rise over the past year. The 31-year-old singer's music video for her single "Burning House" earned her two CMT nominations, for Female Video of the Year and Breakthrough Video of the Year.

WATCH: Cam Literally Burns a House to the Ground in Stunning 'Burning House' Video

Fifth Harmony singer Normani Hamilton opened up about rehearsing with the acclaimed country star, whom she praised for making the experience "effortless."

"She's so incredibly talented and made it super easy for us [to work together]," Hamilton shared. "We went into rehearsal and she made it such a fun process, so we really thank her."

ET caught up with Cam backstage and the "My Mistake" singer was beaming over the show-stopping performance. "I couldn't have done it without my sweet five sisters," Cam gushed.

"They were really excited to be part of the show," the singer added, explaining how the surprising duet came to be. "I have done a capella groups in high school and college and I love singing with women. You really don't get to do it that much."

According to Cam, she only met 5H the day before the awards show, but they "just nailed" their rehearsals and were a joy to work with.

"I felt really good up there so I hope everybody had as much fun as we did," she added.

While Cam was feeling the love at the CMTs, Fifth Harmony's single "Work From Home," off their latest album, 7/27, has been taking the world by storm. The song is the group's first top 10 hit and the first single from a girl group to break the top 10 in nearly eight years.

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So, with the song being spun on nearly every radio station and appearing almost everywhere, ET had to know where is the craziest place the girls have ever heard it played. "Definitely at a country awards show," Cabello joked, "[That's] the craziest place we've heard it."

In March, Fifth Harmony spoke with ET about 7/27, which hit shelves in May. The group described the album as "diverse," "eclectic," "vulnerable," "mature" and "ethnic," adding that their new sound is "very different." Check out the video

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