Thanks for telling us that she lip-syncs.
That is one of the industries' worst kept secrets. Her voice is doctored and enhanced endlessly for her albums and than is just regurgitated at the audience when she "performs" live on stage. It's like paying $200 to watch a stripper with 50,000 of your closest friends while a Spears album plays.
Personally, I'd rather just pay the stripper, skip the Spears, and move right on to the happy ending.
She's a no talent bum who was picked to become the next teen pop star because she
was moderately physically attractive.