Osmond and Kym Johnson beat singer Mya and reality television personality Kelly Osbourne and their professional dance partners for the honor.
"I'm probably putting it on top of my house with a spotlight on it for all the world to see," Osmond told E! News about winning the show's iconic disco ball trophy.
"I'm so happy. I'm so happy. I'm so happy right now!" he said. "I'm on cloud nine!"