Cameron Diaz wants Justin Timberlake to be happy

The former couple ' who separated in 2007 after almost four years of dating ' have teamed up for new movie 'Bad Teacher' and the actress found it "easy" working with her former lover because they are so comfortable with one another.She explained: 'We break up. We move on. All I want for him is happiness. And all he wants is my happiness. His isn't reliant on me and mine isn't on him. It was