This Wikipedia list provides every music artist title you could want to know, plus about one-hundred more. Cher is listed as the Goddess of Pop, the Queen of Reinvention, (although Madonna has often laid claims to that, too), the Queen of Comebacks, and the Queen of Camp (the last one being my favorite). All these being names known primarily in the United States.
Speaking of Goddess of Pop, a search on that this morning shows you can buy a Cher shower curtain: http://fineartamerica.com/featured/goddess-of-pop-cher-daniel-janda.html. Happy showering!