VIDEO : Fifth Harmony Debuts? New Single?? 'Down'

Fifth Harmony is trying to bring the house down. The quartet debuted their latest single, "Down," the first without ex-member Camila Cabello, on Good Morning America on Friday. The group performed the record with Atlanta rap legend Gucci Mane and would promote their new album on the show. As for Cabello, the newly-solo artist also released a song on Friday. The single, is titled "Know No Better," and is a collaboration with Major Lazer, Travis Scott and Quavo.