Nick Jonas is giving back.
The 21-year-old singer surprised sick kids at the Children's Hospital at Montefiore today during a do-gooder mission with Musicians on Call.
During his visit, the hunky crooner hung out with kids and performed some of his new songs, including "Chains" and "Introducing Me." Jonas also serenaded one lucky birthday girl with "Happy Birthday" and performed Pharrell Williams' hit "Happy" at the request of one adorable tyke. One young fan even followed Jonas around as he made his way from hospital room to hospital room.
Too cute.
Meanwhile, Jonas was his usual hunky self during his recent Musicians on Call visit. He looked hot in tight pants, black shoes and a black jacket for the charitable initiative.
Check out all the sweet pics from Jonas' visit!