Final answer:
Milli Vanilli was stripped of their Grammy Award for Best New Artist in 1989 after it was discovered that they did not sing on their album, leading to a major music scandal.
Step-by-step explanation:
The band that was stripped of their 1989 Best New Artist Grammy when it was revealed that they didn't actually sing on their records was Milli Vanilli.
Rob Pilatus and Fab Morvan, the faces of Milli Vanilli, were caught lip-syncing during live performances, and it later came out that the vocals on the album Girl You Know It's True were not theirs. The scandal led to one of the biggest controversies in music history, resulting in the Grammy Award being revoked.