‘Dancing with the Stars’ premiere: Pro Cheryl Burke reveals nervousness, insecurity on the show since becoming sober

Cheryl Burke shared a confession just hours ahead of the season premiere of "Dancing With the Stars." On her drive to the reality show competition's Los Angeles set, Burke — who has danced on more than 300 episodes of the show, beginning in 2006 — revealed in a video post that she was feeling the nerves.

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