Here we go again. Celtic Woman is the ONLY show that I have seen lip Sync. I have never been to a Britany Spears Concert! But at least people know she lip syncs because of there coriography. You can be in denial all you want about Celtic Woman, but they do lip sync at there shows. Next time you go see them WATCH There mouths, there spirit, there movement,. And concerning there clothing, they do a LOT of Costume changes! And you know what else? Underneigh there clothes they are all NAKID!!! This is my last response on the subject of lip syncing. They Lip Sync at there shows thats the bottom line. But not just that, the insterments arn't really playing as well, its all a just pre-recorded mime act. And I paid good money for that! Its a cool visiual experence but your ears are molested of live sound. Nuff said.