The 1D boys reunite to watch Louis' tribute to his mum

Vids 12/12/2016

This is actually one of the most beautiful things we've ever seen...

The 1D boys all reunited to watch Louis' touching performance in tribute to his late mum who recently passed away.

Louis' mum Johannah passed away at the age of 43, and she was apparently super excited to see her son's surprise performance on The X Factor.

The video won't leave you with a dry eye... </3