RE: Milli Vanili
I think it looks acceptable today to lip-synch to your own music and your own voice. That is what Britney and Ashley do.
Milli Vanili was different... they lip-synch to someone else’s voice. I don’t think that is acceptable not even with today’s low musical appreciation standards.
Not saying that won’t happen in the future though.
Milli Vanili lip-synched to someone elses voice because it was before the tuning and other magical capabilities of today. Now anybody can be a singer. Trust me, I know a bunch of 'em.