Florida Georgia Line have dropped a brand-new single, "H.O.L.Y." -- and if you thought you knew what FGL were all about, prepare to think again.

"H.O.L.Y." is a simple slow jam, the lyrics of which praise a woman who "broke through and saved me." The song's titular acronym stands for "high on loving you" -- a prominent lyric in the chorus -- but there's plenty of religious imagery used to describe this "angel" of a human being.

"I couldn't find a day / I didn't feel alone / I never meant to cry / Started losin' hope / But how somehow, baby / You broke through and saved me," Tyler Hubbard sings in the song's first verse. "You're an angel / Tell me you're never leavin' / 'Cause you're the first thing I know I can believe in."

"Bro-country" party anthem, this ain't; it's not even a "bro-country" love song. "H.O.L.Y." is a piano-heavy ballad, written by Nate Cyphert, William Larsen and busbee and produced by Joey Moi. And if listeners are surprised by this change of pace from Hubbard and duo partner Brian Kelley, they're not alone: Florida Georgia Line weren't even sure the song was right for them at first.

"The song came in, me and BK gave it half a listen, probably not even to the chorus, and said, 'Nah, that's not really us. We're gonna pass,'" Hubbard tells ABC News Radio. "A couple weeks later, we just were both kinda like, 'Have you been listening to that "H.O.L.Y.," that song?' Sure enough, we were both like, 'Man, we gotta cut this!"

FGL have also released the music video for "H.O.L.Y.," which fans can watch below. The clip was filmed in Australia, at the Port Campbell National Park -- and the scenery really shines throughout the video.

"H.O.L.Y." is the first single from Hubbard and Kelley's upcoming third album, Dig Your Roots. A release date for the project has not yet been announced, but "H.O.L.Y." is available for download on iTunes.

Watch Florida Georgia Line's "H.O.L.Y." Music Video

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