The "Thank U, Next" Line: "One time on Twitter, I heard Ariana Grande got pregnant, so I got pregnant, so we could be pregnant at the same time," says a visibly-pregnant Colleen Ballinger (a.k.a. Miranda Sings).
The Mean Girls Moment: Ballinger might just be referencing the health class scene in which Coach Carr famously says, "Don't have sex, because you will get pregnant and die."
The "Thank U, Next" Line: Jonathan Bennett, who appears to be reviving his role as Aaron Samuels, says, “Ariana Grande told me my hair looks sexy pushed back. She’s not wrong.”
The Mean Girls Moment: References the scene at lunch where Regina provokes Cady, saying, “Cady, will you please tell him his hair looks sexy pushed back?” shortly after the couple has gotten back together.
The "Thank U, Next" Line: "Ariana broke off an engagement, so I found a guy to propose to me and I broke off an engagement," says Stefanie Drummond, who also portrayed Bethany Byrd in the original movie.
The Mean Girls Moment: This is a nod to Drummond's original line during the rumor montage: "One time I saw Cady Heron wearing army pants and flip-flops, so I bought army pants and flip-flops." She even wears a pink shirt in the "Thank U" teaser again.
The "Thank U, Next" Line: When Troye Sivan's turn comes, he says, “I heard she’s a lesbian now and dating some chick called Aubrey.” This references the sometimes misheard "Thank, U Next" lyrics, "her name is Aubrey" (which are correctly "her name is Ari")...
The Mean Girls Moment: ...as well as the Mean Girls scene in which Regina tells Cady about her past friendship with Janis Ian: "Janis, I can't invite you, because I think you're lesbian. I mean I couldn't have a lesbian at my party. There were gonna be girls there in their bathing suits."
The "Thank U, Next" Line: "Ariana says, honest to god, knock me out. So I decided to punch myself in the face. It was awesome,” Grande lookalike YouTuber Gabi DeMartino says in the video.
The Mean Girls Moment: “One time, she punched me in the face. It was awesome!” said Bethany Byrd in the original montage, in reference to her obsession with Regina.