Cameron Diaz had a desk, chalkboard, and globe to give a real classroom feel to her Bad Teacher photo call in London today. The actress is in England on the latest stop for her global press tour on behalf of the comedy, which is out at home in the US next Friday. She was in Russia yesterday for another engagement, and even dressed up to have a red carpet premiere last night ahead of her trip west. Early Bad Teacher reviews seem to suggest that Cameron and her costars, Jason Segel and Justin Timberlake, will have a hit on their hands. She's nonetheless busy making the press rounds to get the word out about the movie, and Cameron swung by the BBC 1 Radio studios today as well. In an interview with the UK's Independent newspaper, she talked about working with her ex JT. Cameron said of her and Justin's sex scenes, "If it was anyone else it would have been awkward. It would have been a different scene. But instead we laughed a lot. And because it was him, it just wasn't uncomfortable. We were able to do things I may not have been comfortable doing with somebody else. There is so much trust there, there was no issue. Justin and I know who we are and we know where we stand in our relationship. So there's a comfort in that and a safety." Justin has done his share of interviews, including a chat with Playboy, but Jason seems to be sitting things out as he shoots Five-Year Engagement in Ann Arbor, MI.