Fifth Harmony perform 'Sledgehammer' on Good Morning America (VIDEO)

Fifth Harmony performed their new single 'Sledgehammer' on Good Morning America on Wednesday, November 12, 2014.

Fifth Harmony won the MTV VMA Award Artist Watch this year and their album Reflection comes out this December.

Honestly, these girls are the real winners of The X Factor USA Season 2, no question.

GMA serving up some Normani Kordei goodness this morning! Woohoo!

Watch the premiere TV performance of Sledgehammer here: