The two lifelong friends chilled out together before starting the show, where Mark sang “What A Night” with his Jersey Boys co-stars for Derek‘s number with partner Marilu Henner. Check out the video below!
“Was great seeing everyone tonight at #DWTS,” Mark shared on Twitter after the show.
Mark and his co-stars also sang a bit of “Sherry” on the show. While we don’t have a video of that, you can re-watch the acoustic version on JJJ now!
Laurie Hernandez, Val Chmerkovskiy, James Hinchcliffe, Jenna Johnson, Sharna Burgess, Calvin Johnson Jr., Lindsay Arnold, Terra Jolé and Sasha Farber, Jana Kramer and Gleb Savchenko are also pictured below.
Mark Ballas Sings ‘What A Night’ on ‘Dancing With The Stars’