In the music video, the girl was called Kristen Rodeheaver. She is currently 16 years old
Justin picked her from about 10 people. It's unknown whether these peoples were models or not.
Rumour has it that Kristen was Justin's girlfriend of the start of 2010, but this has yet to be confirmed by the Biebs. Even if they were dating, it didn't last that long as Justin has stated that he is single, but he has had crushes on Beyonce, Taylor Swift, Selena Gomez and has been spotted hanging out on the beach with Kim Kardishan.