During the Credits
There is an extra scene during the credits of Barely Lethal.
Heather, appearing to have taken over Knox’s organization, is in the back of a car at an airport. She asks her henchman to find out where Megan is applying to college. As she is exiting the car, as an afterthought she also asks for Megan’s safety schools.
After the Credits
There is no stinger after the credits of Barely Lethal.