As if there was any doubt….Britney lip-synch’s. DUH. But here’s some video that’s fun to watch what we already knew. Britney Spears has started her Las Vegas residency and it seems to be selling really well. She does put on a good show and I guess people aren’t really there to hear her angelic vocals. You can see in this video that Britney puts the mic down by her side and oops she forgets to pick it back up.