Transcript for Maks Chmerkovskiy's Road to Mirror Ball Victory on 'Dancing With the Stars'
Finally tonight, the stunning number. 219,000 tweets during the finale of "Dancing with the stars." Max finally winning. But he came to America with AÑi not so warm welcome. 6, 7, 8. ? Reporter: Millions know him as max. Winning, but few know the story. He came from the Ukraine, learned how to dance as a kid. There he is, his proud dad behind the camera. His family moved to America when he was a teenager. And we heard about something that happened to him shortly after coming to America. Here he is, just shortly after winning. A few years in the making. But who's counting? My parents. Reporter: The parents he often thanks for bringing him to America. He knows what's happening in Ukraine. Do you know what's happening there. Absolutely. Reporter: On his second day here, he got beat up. The second day? The infamous story? Reporter: He had been given a pair of rollerblades, but ran into some tough kids. But all the years later, his family still lives in New York. She's the most popular grandma in the neighborhood. He can run for what she wants to run for in her building. Reporter: Tonight, a small trophy to make up for what happened on that second day. And something else. So, from "World news" -- he told me it was his first pair since that day. And about the gift from his defense partner, merill Davis, he told me she was simply brilliant. And I assured him that this reporter will never be on that dance floor. You never know. I'll see you later on "20/20." Good night.
This transcript has been automatically generated and may not be 100% accurate.