Trivia: All of the entire cast performed their own singing.
Trivia: Executive Producer Peter Billingsly has a cameo as the ticket agent at the airport. Peter also played Ralphie Parker in the 1983 movie favorite A Christmas Story.
Trivia: Originally, Joe Jonas (Shane Gray) kissed Demi Lovato (Mitchie) on the cheek, but it was taken out of the movie.
Trivia: Continue watching after the credits for quite a lengthy extra.
Trivia: When Mike Myers is in the car with Darren Roanoke he is flipping stations (Darren was listening to rap). Mike Myers wants to hear Indian music, Darren switches it back. Mike Myers puts on Bohemian Rhapsody for a brief moment and gives the camera a knowing look. Bohemian Rhapsody was a very popular part of the Mike Myers movie Wayne's World.
Trivia: The man that plays Blake Lively's father in the movie is her dad in real life, too.
Trivia: The number Emily gives Will is 212-664-7665. Unlike the usual fake "555" number often used in movies, this is a real number that's also used in Scott Pilgrim vs. The World and The Adjustment Bureau. Universal Studios acquired it precisely to save having to use a fake number in their films.
Trivia: Jason's surname "Tripitikas" is a wry reference to the Chinese epic "Journey of the West", on which the film is partially based. In it, the Monkey King is freed from a stone prison by the monk Tripitika.
Trivia: Danny Wallace, on whose book the film was very-loosely based, appears in the Hen Night party scene near the end of the film, standing at the bar just behind Jim Carrey.
Trivia: Although the movie title is "27 Dresses", one of Jane's bridesmaid outfits is actually a man's black suit and tie (pant suit), and not a dress at all. This is shown at the end during Jane and Kevin's wedding. So really the movie should be called "26 Dresses and One Suit."
Trivia: Some details are taken from Jason Segel's life. For example, the naked breakup is based on a similar incident and he was working on a puppet-based Dracula rock-opera.
Trivia: After Bender makes a point with the organic eye, there's a picture of Robot B-9 from the Lost in Space TV series on the wall.