United Kingdom, July 2 -- Cody Simpson is unable to walk or talk "for some time" after pushing himself too hard.

The 29-year-old pop star - who swapped music for competitive swimming in the last few years - cancelled promotional appearances for his comeback single Baby Blue last month after suffering a vocal haemorrhage and he's now revealed that not only is he still on vocal rest due to the damaged vocal cord, he's also nursing a knee injury.

Sharing a photo of himself on crutches, along with brief videos of him with a doctor and the moment he hurt his knee, he wrote on Instagram this week: "The universe is serving it to me this year!

"An update on where I've been: I've been on and off vocal rest for close to 3 months trying to heal a...