Mariah doesn't even lipsync well. If you're gonna sell it, SELL IT 
 
Celine Dion lipsyncs ALL THE TIME (literally every performance 

 ), but she SELLS IT so well that you don't even realize it until it's over 

 I think the only time she doesn't lipsync is when greets the audience, but who knows if that's even live 
 
She acts like she's scared to sing or something 
