The video, posted on TMZ.com, shows Spears in the driver's seat.
Wearing a ponytail and aviator shades, she covers her mouth with her hand after realizing she hit the car in front of her.
No one was injured and police were not involved. Photos and video do not reveal any visible damage to either car.
The 26-year-old's bodyguard, who was riding in the passenger seat, gave Spears' information to the female driver of the SUV, People.com and TMZ reported.
Spears was involved in a separate fender-bender on April 12. No one was injured or cited in that accident.
