Lip-syncing has been part of the music industry for a couple decades. Performing live with all the showboating, costume changes, wire work, and choreography - it's understandable But putting people out front and selling them as a singing duo who don't actually sing and call them musical artists is off-the-wall. On November 19th, 1990, "Milli Vanilli was stripped of its Grammy because other singers had lent their voices to the "Girl You Know It's True" album." Forbes: The story of Milli Vanilli is one of the most famous in music industry history.