Fifth Harmony and Little Mix stand strong as two of the most impactful girl groups to debut within the last twenty years.

However, much to the dismay of their former’s fans, the latter often finds itself scoring more accolades, higher sales and arguably better songs even though both acts live under the Sony umbrella.

Unfortunately, comparison became the thief of joy once again this week when their boss Simon Cowell called Little Mix the biggest girlband in the world during a live episode of the X Factor.

Interesting, as both groups were formed on the show.

How the Harmonizers are taking Mr Cowell’s estimation?

Not well…

All hell broke loose shortly after.

Brace yourself.

Why do you think the rivalry between their respective fan bases is so intense?