Rob Pilatus, left, and Fab Morvan of Milli Vanilli are the godfathers of lip-synching. They were outed in 1990 during a live concert when the track they were singing to started skipping. It later emerged the Grammy-winning duo didn’t even sing on their studio albums. They returned their Grammies, lost their recording contract and fell into disgrace, but today the musical duo might be seen as pioneers in what has become a totally acceptable, even expected, practice (the lip-synching part, not the never-singing-at-all part).AP