When friends become bullies
October 29, 2013 -- Updated 1913 GMT (0313 HKT)
Just as bullying has shifted over the years, Hollywood has shifted how bullies are portrayed in film and TV. Take a look back at some of pop culture's best-known bullies.
Rachel McAdams, left, plays Regina George, the meanest of the "Mean Girls," in the 2004 film, and she's particularly cruel and controlling toward her friends.