The opening scene after the opening credits has Evan Peters and the other "freaks" performing Nirvana's "Come As You Are". "Freakshow" takes place in the 1950's and the irony of this is that none of the band members of Nirvana were yet born during this era.
When Jimmy arrived at the Mott house near the end of the previous episode, 7.6 "Bullseye," the twins Dot and Bette were on a walk outside and Dandy was in his room with his mother Gloria. Yet at the start of this episode, Gloria and Dandy take Jimmy right upstairs and the twins are in Dandy's room eating ice cream.