Remember singing "Sweet Caroline?"

Musical legend Neil Diamond cancelled the final third of his 50th anniversary World Tour last January, after he was diagnosed with Parkinson's. But he came out of retirement recently to sing for hundreds of Colorado fire fighters.

Diamond, who is a Colorado resident, insisted on returning to the stage to give an impromptu performance for firefighters and their families as a show of gratitude for their hard work. Before he launched into a rousing rendition of "Sweet Caroline," he praised the fire fighters. "I just want to thank you from the people of this area. I've been here 20 years, and you made everybody happy."