The new The Bachelor spinoff will feature 23 hopefuls in search of a lasting partnership singing popular songs, both individually and as couples, in attempt to form attractions through melodies and ultimately fall in love and be crowned the winning couple.
When asked whether there will be The Bachelor-style Rose Ceremonies on the new ABC spinoff, Harrison toldEntertainment Tonight in an interview fans will see them "at first" and then the format will shift to something brand new.
"At first it is [like] Bachelor in Paradise, women voting off men and men voting off women" at Rose Ceremonies, "and strongest couples survive."
On Bachelor in Paradise, women hand out the roses at the first Rose Ceremony and then alternate turns with the men at subsequent ceremonies.
Harrison teased, "And then we get into the performances."
The harmony of the couples will be tested through musical challenges, and performances will determine which couples get to advance and continue in the competition.
"We have celebrity judges, and also some famous faces from our Bachelor family, and they will decide who makes it out of those performances," Harrison said.
"But they also realize it's about the performance and the chemistry."
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"They're a part of this, because yeah, Jason Mraz and Kesha and Pat Monahan and Rita Wilson, all these people are brilliant, but you know, can they also see that chemistry?" Harrison explained. "So we wanted our [Bachelor] people to have an expert eye on that as well."
The Bachelor Presents: Listen to Your Heart couples whose performances showcase love and their devotion to one another will continue to be given a chance to further their relationships until only one couple is left standing.
"There's always the hope and the promise of love, and if love is strong enough, it would be a proposal," Harrison shared. "Some, maybe multiple couples, would ride off into the sunset. I mean, it's happened in Paradise."
Fans of the franchise, however, will notice the couples never moved into the famous The Bachelor mansion in Malibu, where The Bachelorette is also filmed.
Harrison told ET there were "two very specific reasons" behind that switch-up.
"The Bachelor mansion, as massive as it is, is not big enough space-wise for this. Because we need space for performances and just a lot more space, because there's a lot more people. And on top of that, we thought, 'Fresh show, fresh look,'" Harrison said.
"Bachelor in Paradise is somewhere different, and we really wrestled with this idea. We're like, 'You know what? Let's go somewhere different.'"
Harrison said while production "could've crammed" the show into the mansion, that didn't seem desirable when filming commenced in January.
"We thought, 'Let's take it to a different place.' It's kind of a ranch with a mansion on it, and so we got lots of sprawling space. Because one of the first performances is actually on the property, so it works," the host noted.
Reality Steve spoiler blogger Steve Carbone reported The Bachelor Presents: Listen to Your Heart's finale was filmed in February.
Click here to read spoilers on Episode 1 of the show, and click here to read finale spoilers on the Final 2 couples and the winning couple.