Did Cameron Diaz goof her Oscar presenteation on purpose?

Answer 1

Yes, Cameron mistakenly referred to Steve Carrell as Jude right after Steve read a line about how good looking they both were. It was joke. The lines had actually been written for Cameron and Jude Law. Jude couldn't make it to the Oscars, so Steve Carrell took his place. He read Jude's line about how good looking he and Cameron are, and Cameron put him in his place by calling him Jude. Cameron and Jude really are good looking. Steve is not. Steve is funny (and so is Cameron).