Chak de! India (2007)
Poster of Chak De! India(2007) seen on billboard
The school principle (Satish Shah) was telling Sameer (Shahid Kapoor) that the school girls hockey team is doing well because of the Chak De effect, referring to the film Chak De India (2007) starring Shahrukh Khan
One of the characters sings the title song.
Just before Team India performs for the first time in WDC, Mohini gives a motivation speech which almost the same one with the speech that Shahrukh Khan gives in Chak De India (2007) before the team goes to match. So that Charlie gives bored looks and also the scene is mocked by saying "the speech was very original."