Britney Spears is just in the process of settling into Las Vegas – she got a huge welcome as she prepared to start her two year residency performing there. So far so good, but she’s already starting to get slightly hoarse. Tomorrow the syndicated show The Doctors will talk about the possibility of her suffering from Vegas Throat. This condition has been described as an asthma-like bronchitis caused by a combination of the dry climate, powerful air conditioning, and smokey casinos. Back in 2009, Cher was out of commission with this disorder and had to cancel dozens of shows. Maybe that’s why so many singers lip-synch in Las Vegas.