Why do people lip sync?

Answer 1

Celebreties often lip sink because they are either sick or injured(ex. Blew a vocal tube) or just unable to sing at the time bieng where as to other singers just cant sing at all because there songs were autotuned.

But if your talking about in public if someone is lip sinking its because they dont know the words

Also they might be dancing and there to tired to sing and out of breath or they cant multi-task

Answer 2

Britney Spears lip-syncs because she's not good at singing live. There was a time when she sung live early in her career, but she has stop doing it. People like to say that "its because she dances and put on a show." However, there are similar singers who performs with big production numbers on their shows that still able to sing live, such as Beyonce, Lady Gaga, Christina Aguilera, Pink.

Answer 3

Michael would rarely lip-sync when he was on tour, He would only lip sync because of the demanding dance routines he had to perform.