Celine Dion has some of the best-known vocal cords in the world, and she put them to good use with one of the longest Vegas residencies of all time, singing to sold-out audiences night after night and treating them to renditions of all her greatest hits. After a thousand renditions of 'My Heart Will Go On,' there can be a lot of wear and tear on your voice and your throat. Dion doesn't have to worry about that, though, thanks to her handy $2m humidifier system.
As part of the deal that saw her agree to accept the Vegas residency, Dion insisted the venue bought her the high-tech contraption, which gently sprays mist on her the whole time she's singing and maintains the ideal conditions for her voice. It also takes care of the temperature and level of humidity in her room as she prepares to go on stage.