Irony as She Is Cast: Vikki and Peter are played by two queer actors (although strictly speaking, neither of them were out publicly at the time of the movie's release), with many knowing in-jokes about Peter not being gay even though Vikki thinks he just might be.
Actor Allusion: Yu Ping casually asks Yang Guo if she's ever seen Meteor Garden. The lead character of that series was Jerry Yan's (who plays Yu Ping) breakout rule. Her response? "I saw the Korean version and loved Goo Jun Pyo" (played by Korean actor Lee Min Ho).