Niall Horan has fractured his foot.

The One Direction singer was seen with a cast on his right limb whilst on stage in Montreal, Canada last night (05.09.15) and when quizzed about the injury by bandmate Louis Tomlinson, the 21-year-old singer admitted he has no idea how he did it.

In a video posted online, he said: ''I woke up before the show the other day and I had a pain in my foot. Then I went to get an X-ray today and I've got a fractured right foot and I don't know how.''

The news will certainly not please the 'Night Changes' hitmaker as he has been making good progress recovering from his knee surgery.

In July this year, he shared his success with fans on Instagram, writing: ''First time I've been able to touch my arse with my heel since I got the operation. Sounds so dumb, but it's a big day in my head haahah! (sic)''

And luckily for the accident-prone pop star, he has a reduced risk of injury, admitting he's not the daring type.

He said: ''I'm not very daring, I'm all about a gentle game of golf. I'm actually quite boring and probably the worst pop star that ever walked the planet.''