An unusually high number of adults in the U.S. may actually believe in Santa Claus. A recent Ipsos holiday season poll of more than one-thousand adults found 21 percent of respondents said they believe in St. Nick. Meanwhile, 46-percent of those surveyed said their children are believers. The poll also found three-quarters of adults think most Americans have forgotten the real meaning of Christmas. Meanwhile, Americans said the most annoying or overplayed Christmas song is Mariah Carey's "All I Want for Christmas."