So You Think You Can Dance - Season 4 - Eps 12: The Top 14 Perform
Host Cat Deeley promised at the outset that the final 14 dancers will face some changes and the competition would get more difficult for the final seven couples. She soon explained that each of the couples would have to dance twice for the first time this season. Hip hop choreographers Napoleon and Tabitha Dumo served as guest judges, joining regulars Mary Murphy and Nigel Lythgoe.
About So You Think You Can Dance

Title: So You Think You Can Dance
First Air Date: 2005-07-20
Last Air Date: 2024-05-20
Status: Returning Series
Rating: 7.1/10 (from 68 votes)
Language: EN
Seasons: 19
Total Episodes: 318
Network: FOX
Genres: Reality
Production Companies: Dick Clark Productions, 20th Century Fox Television, 19 Entertainment, MRC Live & Alternative
Synopsis
Dancers selected in open auditions across America take part in a rigorous competition designed to best display their talents, training and personalities to a panel of judges and viewers as they strive to win votes and avoid elimination.
Cast

Cat Deeley
Self - Host

Stephen 'tWitch' Boss
Self

Matthew Morrison
Self

JoJo Siwa
Self - Judge

Maksim Chmerkovskiy
Self

Allison Holker
Self - Judge