We've known and loved Fifth Harmony's single "BO$$," but now we have a new song to obsess over! While performing an Idolator session, Fifth Harmony debuted a brand new song from their upcoming album.

"We Know" is about not trusting a shady guy, and Camila Cabello says, "If you're a girl, this probably relates to you in some shape or form."

Of course, this is only the acoustic version of the song, so we don't know what the final version will be like. But it sounds so good acapella!

What do you think about "We Know"? Does it compare to "BO$$"? Sound off in the comments!

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