It will be the group's first performance as a foursome after Camila Cabello's exit last month.
Fifth Harmony will perform at the People's Choice Awards -- the first announced performers for the Jan. 18 show.
This will be the first time the group will perform in 2017, now as a foursome without Camila Cabello, who left the group in December.
Fifth Harmony won their first People's Choice Award last year for favorite group. They are nominated in the same category again this year.