Milli Vanilli. Perhaps the most infamous and most embarrassing lip-synch in history comes courtesy of Milli Vanilli, a German pop duo consisting of male models Rob Pilatus and Fab Morvan. Hot off winning the Best New Artist Grammy, Milli Vanilli were recording a concert special for MTV when the backing track for their hit "Girl You Know It's True" kept skipping, revealing that the duo were not singing live. In fact, they weren't singing at all; it was later revealed that neither Pilatus nor Morvan actually sang on their debut LP. The duo were subsequently dropped from their label Arista and forced to vacate their Grammy win on their way to becoming one of music's biggest punch lines.