slutty babysitter can't hold Justin back from doing the nasties. A boy's gotta do what he's gotta do.
By the way, "sleepover" is the best invention ever made, it really deserve a Nobel Prize. Who cares about discovering viruses and mechanism of spontaneous symmetry breaking when you can stay up all night without parental supervision.. eating milk and cookies... of course.
Here are some pictures of Selena and Justin chasing after an ice cream truck.
Pictures from Getty