I don't know why other artists and the haters care so much about Britney's lip-syncing... They feel pressed cause she doesn't care about what people say and her fans still sold-out her shows
Anyway, It's been 9 years since Britney started lip-syincing every performance or show (except the ballads, but now a days she also lip-syncs the ballads)... So it's time to get over it!
(Yes, It's 9 years cause she used to sing live during her Baby One More Time era -- late 98 and 99)....