Cameron Diaz left her trailer on the LA set of Bad Teacher yesterday wearing a bright yellow dress. She was fresh off a Sunday at the Oscars, where she presented in Oscar de la Renta and switched things up with a shorter dress to stand out as a golden girl at the Vanity Fair afterparty. While making her way down the red carpet, Cameron shared her excitement about working with her ex Justin Timberlake again, saying, "We’re thrilled to have him . . . He’s the best person for the job. He’s going to be hilarious. He’s fantastic, he’s going to be so great."