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Cameron Diaz shared the secret to filming love scenes with an ex when she and Justin Timberlake hit the red carpet at the New York City premiere of Bad Teacher. "We made a conscious effort to create the least sexiest sex scene ever put on film," the actress told reporters. "We had a lot of fun trying to make it as ridiculous as possible." Click through to see Jon Hamm, Zooey Deschanel, Cat Deeley and more stars at last night’s hottest parties!