Cameron Diazattended the UK film premiere of What To Expect When You're Expecting at BFI IMAX in London today (May 22). Joined by British songstress Cheryl Cole, the 39-year-old actress was a vision in white as she debuted her latest romantic comedy to a British audience. Cameron gushed about working with the singer, saying: "We had a blast. She did a great job playing herself, so -awesome actress! Cheryl was a lot of fun & ...