LOL that is mostly TV shows and 10 examples over a long time span. Hardly 90%. Maybe. .001%?Almost every "popular" singer from the past 2 decades at their "live" performances. Never seen that? Heres a quick top ten, not counting all the current hacks like Ariana Grande for example.
https://www.billboard.com/articles/...famous-lip-sync-incidents-videos-mariah-carey