Jacque and all-star Will (season 4) dance to a contemporary routine choreographed by Sean Cheesman; the dance involved a big red ball and balloons. It was about young, innocent love
The top 6 perform in a group routine choreographed by Nick Demoura, Justin Bieber's choreographer, at the beginning of the show. They were DJs or robots or something.
Valerie and Ricky dance to a Broadway routine choreographed by Spencer Liff. There was a giant swing, and the two of them enjoyed themselves very much -- very 1950s movie-musical happy.
Valerie and all-star tWitch (season 4) do a hip hop routine choreographed by Will "Willdabeast" Adams: a wedding party theme with a twist. They're the coolest bride and groom ever!
Zack and all-star Fik-Shun (season 10 co-winner) dance a hip hop routine choreographed by Phillip Chbeeb (season 5). Zack and Fik-shun are a living, moving inkblot ("Rorschach") test.