Fifth Harmony fans reportedly started the hashtag after the 5SOS interview, which included quotes about hooking up with their fans, made the rounds.
In response to the hate the 5SOS guys were getting, One Direction and 5SOS fans joined forces to fire back...it was a beautiful thing.
It seriously makes me so happy when our fandoms get along no matter what we're always the two to come together #5SOSIsDeadParty— Julia (@reject_horan) December 27, 2015
Directioners always have the 5SOSFAM's back and vice versa! That's why I belong to both! #5SOSIsDeadParty— Hemmo (@melaniecuevas1D) December 27, 2015