On the Dancing With the Stars Season 18 finale, the couples had to redo their Switch Up week styles. For Amy Purdy and Derek Hough, that meant tackling the Salsa.

In their video package we see that Amy is still struggling with her back injury. It took her out of rehearsal for the day. But she's not letting that stop her. Derek said that Amy has fought tooth and nail each week to make it to the finals, and this is just another hurdle.

Derek gave her a very fast, fun, pose heavy Salsa. Some really cool moves in there, and she looks great in red. Good work.

"The more you see, the more you admire and love it!" Len gushed. "This girl is on fire!" Bruno said. Flashy, flamboyant, she was so in tune with the rhythm it was like she was part of the band. Carrie Ann called it ridiculous. She sees huge improvement from the first Salsa.

Score: 30/30.

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The Dancing With the Stars Season 18 finale, Night 2 airs tomorrow, Tuesday May 20 at 8 p.m. ET/PT on ABC.