For their performance of "My Life Would Suck Without You" for Mr. Schuster, the New Directions incorporated choreography bits of quite a few of their past performances such as the line dance from Kristin Chenoweth's episode, the guys sitting on the stage from their "Confessions/It's My Life" mashup etc.
Anna Camp, who guest stars in this episode, has worked with Skylar Astin in Pitch Perfect (2012) and Pitch Perfect 2 (2015). Astin is good friends with Lea Michele (Rachel) and Jonathan Groff (Jesse) since they all worked together in the Broadway musical "Spring Awakening" and he has appeared in City of Angels (2014). Moreover, another "Spring Awakening' cast member, Phoebe Strole (Penny) appeared in the 5th season of Glee (2009). Finally, Jenna Ushkowitz (Tina) had joined the cast of "Spring Awakening" in 2008 as an understudy.