Tracy offending the gay community with his stand-up act was based on a real controversy caused by Tracy Morgan, who went on a "homophobic rant" during a stand-up performance in Nashville in June 2011, between the fifth and sixth seasons. The jokes used in the fictional version were not as inflammatory or offensive as Morgan's real jokes in Nashville.
Liz's senior yearbook photo is Tina Fey's actual senior photo. Liz's senior quote is "Where's the beef?" from the iconic 1984 commercial for Wendy's restaurant chain.
As shown on the $10,000 check Jack gave him, Criss's last name is Chros.
"Terry the gender neutral doll" is wearing an outfit identical to the one Liz is wearing when she opens her gift from Criss.
As Tracy has apparently pointed out, Liz's phone extension is 2647 (ANIS).