Katherine Jenkins always emanated that ~Las Vegas lounge act~ kinda vibe, so we're happy to see that she's finally embraced it, replete with the prerequisite harpy green silk dress. Last night, Jenkins appeared in duet with producer/songwriter David Foster at Las Vegas's Mandalay Bay Opera Hotel, where she shared the stage with Philip Bailey of "Earth, Wind & Fire", Brian McKnight, and a handful of other washed-up cruise ship entertainers & American Idol flash-in-the-pans. What's up, pu$$ycat?