Alvin and the Chipmunks: The Road Chip is a 2015 American jukebox musical comedy film directed by Walt Becker and written by Randi Mayem Singer and Adam Sztykiel, based on the characters Alvin and the Chipmunks created by Ross Bagdasarian Sr. and the Chipettes created by Janice Karman. It is the fourth and final installment in the live-action Alvin and the Chipmunks film series and the sequel to the 2011 film Alvin and the Chipmunks: Chipwrecked. The film stars Jason Lee, Tony Hale, Kimberly Williams-Paisley and Josh Green. Justin Long, Matthew Gray Gubler and Jesse McCartney all reprise their roles as the Chipmunks, while Kaley Cuoco, Anna Faris and Christina Applegate play the Chipettes. Cuoco replaced Amy Poehler as the voice of Eleanor in the film. The plot centers on the Chipmunks as they head to Miami after believing that Dave will propose to his girlfriend Samantha, who has a son who bullies the Chipmunks. Along the way they end up in unfortunate circumstances, such as being put on the No Fly List.

The Chipettes are a fictional girl group from the Alvin and the Chipmunks franchise consisting of three female anthropomorphic chipmunk singers: Brittany, Jeanette and Eleanor, alongside their adoptive human mother, Beatrice Miller. They first appeared in the animated television series Alvin and the Chipmunks in 1983. In this and related materials, Brittany and the Chipettes served as female featured characters in their own right, starring in numerous episodes. The title of the show was changed from Alvin and the Chipmunks to simply The Chipmunks in 1988 to reflect this. In the animated television series and the 1987 animated film The Chipmunk Adventure, all of the Chipettes were voiced by their creator, Janice Karman, the wife of Ross Bagdasarian Jr.. Karman also wrote and voiced the Chipettes' dialogue on their studio albums, while studio singers Susan Boyd, Shelby Daniel and Katherine Coon provided their singing voices. In the animated television series Alvinnn!!! and the Chipmunks, Eleanor is voiced by Vanessa Bagdasarian, the daughter of Ross Bagdasarian Jr. and Janice Karman.