Nick and Peta took the stage first, performing a cha cha set to "Come Get It Bae" by Pharrell Williams, and the new mom flaunted her flawless washboard abs as they rocked the stage.
Peta and Maks welcomed their first child, Shai Aleksander, back in January. By the time the last season premiered in March, both stars were already back on the dance floor and in top form, but it's possible that Peta has never looked better.
For their efforts, Nick and Peta earned three '6's, putting them toward the front of the pack -- but that was before Vanessa and Maks came out to show them how it's done.
Vanessa and Maks also performed a cha cha -- set to "Woman" by Kesha feat. The Dap-Kings Horns -- and the pair hit the stage making light of Maks being a new dad. Vanessa, who shares three children with Nick, came out pushing a black stroller while Maks began the dance with a Baby Bjorn strapped to his chest and carrying a fake baby.