Ever since Justin Timberlake co-stared former girlfriend Cameron Diaz, he started mocking his current girlfriend Jessica Biel. Once source revealed for UsMagazine.com, that Justin "doesn't respect her anymore", adding that "when she's not around, he'll make fun of her to his friends".

At the same time, 29 years old Timberlake and 37 years old Diaz are flirting on the set of their movie 'Bad Teacher'. There's "lots of laughing, making fun of each other, kidding around off camera. She's sassy with him and slick, prancing around in tight clothes", the same source said. This made Jessica very furious even though she refused to admit it. "He tortured Jess by taking this role, and they are reaching a breaking point. The truth is, I don't know if they can survive this", one friend revealed.