Diva Las Vegas! Celine Dion, Cher, Shania Twain. Now you can add Mariah Carey to the list of Las Vegas headliners. The pop diva pulled out all the stops during opening night of “Mariah #1 to Infinity,” her residency at The Colosseum at Caesars Palace. Check out some of the highlights in the video above. Will you be making a special trip to see Mimi?