Demi slayed. I kinda wish she weren't as humble and just SHAT on the bridge and adlibs. But she knew 5H needed them votes and for Dinah to get out of that room with 365 family members.
Demi did great
And 5th Harmony did great as well
Although I believe 5th Harmony could still work on how to make their voices work well together in certain bits of the song.