Charli D'Amelio and dance partner Mark Ballas open up to ET's Matt Cohen after competing on 'Dancing With the Stars,' which streams Mondays on Disney+. The TikTok star explains what it was like having boyfriend Landon Barker’s dad, Travis Barker, and stepmom, Kourtney Kardashian, in the audience during James Bond night. Plus, Charli gets real about the 'awkward' start to her relationship with Landon.