Lea Michele's character Rachel Berry sings "Let It Go" which is from the film Frozen (2013) and originally sung by Idina Menzel. Menzel played Rachel's mother, Shelby Corcoran. The pop version of the song was sung by Demi Lovato who played Dani in season five.
An instrumental version of "Loser like me", the song that lends itself to the title of this episode, can be heard playing when Rachel and Blaine are in the coffee shop
Blaine songs Suddenly, Seymour from Little Shop of Horrors. Darren Criss would later play Seymour himself.