To celebrate the 40th anniversary of Saturday Night Fever, last night’s episode of So You Think You Can Dance honored the disco-drama with a Bee-Gee dance number and ’70s inspired moves performed by the remaining ten dancers and SYTYCD all-stars.

The number was choreographed by Val Chmerkoviskiy and Mandy Moore.

The second performance of the night came from Mark and Comfort as they danced to “Hater” in a routine choreographed by Ray Leeper.

The dance is based on the idea of a forbidden love in which the couple wants to be together but knows that they shouldn’t be. Judges Nigel LythgoeMary Murphy, and Vanessa Hudgens all enjoy the jazzy routine.

Next up, Lex and Gaby dance to “Red & Black (Rojo y Negro) by Ryota Komatsu in a routine choreographed by Miriam Larici and Leonardo Barrionuevo.

The Argentine Tango was flubbed by Lex and Gaby at times but the duo pulled it off for the most part. Nigel recommended the dance as relationship therapy and Vanessa told Lex to “keep doing your thing.” Mary was the only one who felt the dance needed a bit more passion.

Getting more contemporary Kiki and Jenna performed a hip-hop dance choreographed by Luther Brown to Aminé’s “Caroline.”

Both dancers, dressed in outfits that can only be described as a cross section between The Joker and Beetlejuice. Together, the two dancers celebrated nabbing a giant stack of money that sat wrapped in cellophane between the two of them for most of the performance.

The judges loved the number, particularly because Kiki isn’t very rehearsed in hip-hop dancing.

Staying in the hip-hop arena, Kaylee and Cyrus danced to “I’m Better” by Missy Elliot. In the number choreographed by Phoenix and Pharside, Kaylee and Cyrus performed as aliens inhabiting human bodies. The concept and dance are a little strange for the judges but is written off and celebrated as unique.

The dance was important for Kaylee, who was told last week that she needed to step up her game. It seems she did just that.

In a different strange concept dance, Logan and Allison danced to “In the Morning” by Jaded in a jazz fusion number choreographed by Brian Friedman.

The dance was centered on the idea that the two dancers were on a blind date in the far future. Wearing black and silver clothes that weren’t too far off from stereotypical future wear, Logan did a flip into a split that wowed the judges. The judges thought the routine was one of the best of the night.

In one of the final performances, Robert danced with Jasmine to “Otherside” by Perfume Genius. The contemporary dance choreographed by Stacey Tookey, Robert plays a weary hotel guest, and Jasmine, a hotel employee, who is herself weary.

The two emotional dancers connect outside of the a neon red hotel sign and passionately dance for about a minute and a half.

Unfortunately, the emotional performance wasn’t enough as Robert was sent home.

So You Think You Can Dance airs on FOX on Monday nights at 8 p.m. EST.