Fifth Harmony harmonized beautifully in a new acoustic performance of 'Who Are You.'

The song, a heartbroken ode to an up-and-down relationship, sounds even sadder (but in a lovely, bittersweet way) when it's stripped down to just the vocals and minimal arrangements. The 'X Factor' alums include the song on their 'Better Together' EP with a bit more production, but the raw talent is always still there. Their voices are the stars of every show!