Jack Osbourne almost froze to death filming his TV show Adrenaline Junkie in Finland.
The 21-year-old battled through extreme temperatures in mountains where temperatures dip to minus 30 degrees Celsius.
Show sources claim he narrowly avoided serious frostbite.
An insider on Adrenaline Junkie says, "He had to rest in an emergency shelter and was vomiting beside his sleeping bag. Everyone was really worried."