Fith Harmony's single "Worth It" has sold over 1 million downloads, but the pop group is just as surprised by the success of the single as anybody else.

During an interview with Billboard, the singers revealed that they didn't expect "Worth It" to be the biggest single off of their album "Reflection."

"With 'Worth It,' we were really surprised," said Normani Kordei. "We love the song, but we were kind of surprised, to be honest."

The single, currently number 15 on the Summer Song Charts and number 10 on the Radio charts, has given the group a boost in popularity.

"It's normally the songs that you don't really think that are the hits!" continued Dinah Jane Hansen.

The group has performed the single the last couple of weeks at various appearances and events, such as "The Today Show," BET's "The Players' Awards," and Premios Juventud, where the group performed the Spanish version of the hit single titled "Dame Esta Noche."

"This is definitely our biggest single to date for sure, and so just to see it continue to climb and see it on the charts with Ed Sheeran or Taylor Swift, or whoever's big right now, it's right next to them and right there with them," said Lauren Jauregui. "It's frickin' platinum! To say it's platinum, that a million people bought that song, it's amazing. It's so incredible to see that the support has gone beyond our fan base."

In June, Jauregui also told Complex that the group will not be falling victim to the group breakup curse.

"We've been through the highest points of our lives together and the lowest points of our lives together," she said. "Through that process you get to know the best of people and the worst of them, and I feel like respect is knowing both and being able to surpass the negative things."

The group, who originated on the American version of "The X-Factor" in 2012 after they were put together as a group by Demi Lovato and Simon Cowell, are currently on their "Reflection" tour with guest act Natalie La Rose.