Vegas' Best: Sinatra, Cher, Elvis

The Rat Pack -- Frank Sinatra, Dean Martin, Sammy Davis Jr., Peter Lawford and Joey Bishop -- were largely responsible for developing Las Vegas' reputation as an entertainment destination during the 1960s. Oftentimes, though, just one would be scheduled to perform, and the other members would show up unexpectedly onstage, to the joy of soldout audiences. (AP Photos)