Nash jiggled and jived and gave showed America her quickstep and her quick wit.
"This woman has no limits and I think she should have her own sitcom," Van Amstel said.
"Look at him trying to hustle up a job for me," Nash said. "Well, I do have three kids."
That experience came in handy, because while she was learning to dance she was offering her own lessons backstage.
"This cast needed a lot of mothering," Nash said. "They needed help with their relationships, their mayhem, their foolishness. They needed snacks. And someone had to do it."
NFL star Chad Ochocinco and his partner Cheryl Burke finished in the bottom two and faced elimination.
The final four couples will compete next Monday night. In addition to Ochocinco, the final pairs include Pussycat Dolls star Nicole Scherzinger and her partner Derek Hough; reporter Erin Andrews and her partner Maksim Chmerkovskiy; and Olympic figure skater Evan Lysacek and his partner Anna Trebunskaya.