Tanisha danced the Argentine Tango with all-star Ryan from season 6; it was choreographed by Mariam Larici and Leonardo Barrionuevo. The technique was super intricate and perfectly executed.
Valerie danced a Jazz routine with Ade from season 5, choreographed by Tyce Diorio. Valerie was very upset and struggling with something inside her, personified by Ade.
Rudy danced a Cha cha with all-star Jenna, choreographed by Louis van Amstel. No story - the dancers were just hot for each other. Rudy had a vest with hot pink lining, which Cat liked
Jacque and all-star Chehon (season 9) dance a Travis Wall contemporary ballet routine. It was gorgeous, but the lighting was HORRIBLE so you couldn't see the dancers' feet or faces. :(
Ricky danced a Mandy Moore jazz piece with all-star Lauren, season 7 winner. The dance was an homage to rockabilly music; the two were having an awesome time at a party.
U Got Me Up (Underground Goodie Mix '93) [feat. Dajae] — Cajmere
Jessica and all-star tWitch from season 4 perform a "Nappy-Tabs" hip-hop routine. tWitch is an adorable (but kinda creepy) old man harassing an imaginary 1940s-era pin-up girl at a bus stop.
Europe, After the Rain — Max Richter & BBC Philharmonic Orchestra & Rumon Gamba
Zack and all-star Amy (season 10) dance a contemporary routine choreographed by Sonya Tayeh. Zack has just died, suddenly and prematurely, and he and Amy have one last goodbye.