While driving to get to a photo shoot location, a Ford Focus and a Ford Ka pass in opposite direction among other cars. Both models did not exist before 1998 and 1996 respectively.
In an early scene, the vice-principal goes over Chance's academic history in an interview with Chance and states that he is known to sometimes channel deceased torch singers such as Rosemary Clooney, Dionne Warwick, and Ethel Merman; however, as the movie takes place in the 1980s (never indicating which exact year), the only singer of the three that might have been deceased is Ethel Merman (d. 1984). Rosemary Clooney died in 2002, and Ms. Warwick was still among the living going into 2013.