The 26-year-old hit the recording booth with the people from Singing for Superheroes -- a group that creates original music for children with disabilities.

Since West suffers from arthritis, he's made that his cause -- and recorded the song "Body of Steel" with 10-year-old Jillian, who is also battling the condition.

West says he hopes the song will inspire kids with similar medical conditions to keep fighting and not let it get in the way of chasing their dreams.