VIDEO: What this dad does for his disabled daughter will make you weep

You might want to make sure you're alone when you watch this.

McKenzie ‘Kenzie’ Carey is a 12-year-old from Georgia in the US and she loves performing in pageants. She's even won a few.

Sadly, when she was 18 months old, Kenzie was diagnosed with Mitochondrial disease. The disease is life-threatening and it has damaged her brain, heart and skeletal muscles - leaving her unable to walk or speak.