Impossible sounding, and often untrue, stories about the famous have been around for as long as there have been celebrities. Still, as you'll see in the following countdown of Rock Music's 25 Craziest Conspiracy Theories, this particular kind of superstar buzz exploded once we took off on the information superhighway. One of the older examples predates the internet, as fans openly wondered whether Paul McCartney had been replaced by a lookalike prior to 1967's Sgt. Pepper's Lonely Hearts Club Band. But fast forward a couple of decades, and it gets really weird: A conspiracy theorist later emerged who actually thought...