Radio shock jock Howard Stern was asked to lend his voice to the upcoming "Transformers" movie but had to turn it down at his agent's request.In one scene Soundwave, a robot who takes the form of small consumer electronic devices, will appear as a radio which was supposed to briefly sprout Stern's voice.According to Stern on his Monday radio show, he was contacted a week ago in a letter asking him to be in it, but "My agent gets a hold of me. It's almost like he shakes me up and smacks me. I said to him: This movie, The Transformers, it could be a really big movie. And he goes 'So, it won't be because of you, because your f'n voice is on the radio. I thought it might be kinda cool but my agent said 'you don't want to be in the movie as an f'n voice on the radio. And I said, you know, you're right."