Jamie Foxx knew that 'Stealth' was a bad movie from the moment the cameras stopped rolling, but he kept the information to himself for a long time. When he finally admitted it, he did so in the form of an apology for all the interviews he'd given in support of the movie when it was first released! All major stars are contractually obligated to do media calls in support of their films. That must be awkward when you're trying to find something positive to say about a film you know everyone's going to hate.
Foxx sat in front of multiple television cameras, and told everyone that 'Stealth' was a great film, and that people should go and watch it. According to him, he even had friends getting in touch with him after taking his advice, asking why he'd lied to them and made them subject themselves to the terrible film!