'DWTS' Finale: Kim Kardashian Roots for Rob, Kirstie Alley Returns

"Dancing with the Stars" finalists Rob Kardashian, J.R. Martinez and Ricki Lake took to the stage on Monday night and showed off some impressive moves, with Rob earning a perfect 30.

Rob's famous family cheered him on in the audience, with older sister Kim making her first appearance at the studio since announcing her divorce from Kris Humphries. The Kardashian clan wore matching white button-down shirts and black jackets for the action-packed evening. Rob commented, "They dressed for the occasion!"

A slimmed down Ricki Lake, who lost 20 pounds and four dress sizes, had previously expressed not wanting to let her partner down, since this potential win could earn Derek Hough a record-breaking fourth mirror ball. Last season's "Dancing" favorite Kirstie Alley showed her support for Ricki, saying, "I like Ricki. I love Ricki!"

Alley, who danced last season with Maksim Chmerkovskiy, gave her take on all three performances, beginning with J.R.'s routine. "It was daring and it was crazy. I loved when he jumped into her arms."

Kirstie admired Rob's freestyle, pointing out that "he shakes his booty really well. He's on my list." She added, "I'm coming after you, dude."

J.R. and his half-naked partner, Karina Smirnoff, received harsh criticism from a disappointed Len Goodman, who said, "That wasn't that good." J.R., noting the pressures of being a finalist, discussed Smirnoff's emotional rehearsal, saying, "It's not easy as a pro dancer to trust somebody who's never done this before."

All three dancers have come a long way, but there can only be one winner. See who will be crowned season 13's "Dancing with the Stars" champ... tonight on ABC!