During the part where AB gets the bus stuck in a ditch, there's an error with consistency. When they drive away to get gas and during the times they're stranded in the middle of nowhere and hitching a ride to the nearest phone, it's daytime. When AB calls Abraham to tell him they got stuck, he and Marcella are already in bed asleep.
When Selena's father is teaching them how to play instruments when they are young, he tries to play the drums but Hen falls. When he falls, he lands on a pillow, but in the next shot, the pillow is gone.
During Selena's Grammy walk, the song Bidi Bidi Bom Bom is played. Selena won a Grammy for the album Live, which didn't have Bidi Bidi Bom Bom on it. At Selena's actual Grammy walk, the song No Debes Jugar was played.
Toward the end of the movie as they show Selena's death after she's been shot and being taken away on a stretcher, she is wearing jeans and a short sleeve top. In real life, Selena was wearing a regular gray jogging suit.
During the beauty saloon scene Selena states that they were flying out to Los Angeles for the Grammys. However the Grammys that were depicted in the film did not take place in Los Angeles. Selena won her Grammy at the 36th Annual Grammy Awards which was held in New York City.
At the beginning of the movie when Selena walks up to the stage at the Astrodome, we can see Suzette Quintanilla playing and Pete Astudillo as one of the background singers. In the real concert Suzette did not play due to illness and the background singer is named Freddie Correa.
In the film they show Selena and Chris getting eloped right after Selena went bungee jumping. In real life, Selena didn't go bungee jumping until 1993, a year after she and Chris married. Also, in the movie after the elopement they show Selena wearing a white shirt. In real life she wore a Coca Cola jacket.
As Selena and Sara go up the escalator in the "Beverly Center", an event sign, clearly visible on the right side of the screen, reveals the actual name of the mall they are in (Ingram Park Mall, which is in San Antonio, Texas). There is also a date shown on the sign (October 19, 1996) which postdates Selena's death by more than 1 year.