OneRepublic have honoured a teenage fan battling cystic fibrosis by paying tribute to him in their latest music video.

The promo for I Lived features Bryan Warnecke cycling and skateboarding, as he explains what it's like living with the hereditary disease.

The teen says, "It feels like I'm breathing through a straw. Whenever I try to breath hard it hurts. I want to make the most out of my life and have as much fun as I possibly can and my biggest fear is not being able to do that."

The video ends with OneRepublic frontman Ryan Tedder driving Warnecke to a concert at Red Rocks Amphitheatre in Colorado.