Dwayne "The Rock" Johnson is set to ring in the holidays as host of TNT's annual music spectacular Christmas in Washington. Johnson will introduce a stellar lineup of musical performers, including Aloe Blacc, who topped the charts around the world with "Wake Me Up," his mega-hit with Avicii; Hunter Hayes, a four-time Grammy® nominee and the youngest male performer ever to top the Billboard country chart; Rita Ora, the British singer songwriter who is also making a big splash in fashion and film; Christina Perri, whose hit single "A Thousand Years" went quadruple-platinum; Darius Rucker, the chart-topping, Grammy-winning singer-songwriter who has successfully transcended multiple genres; and and Earth, Wind & Fire, the legendary pop/R&B band whose remarkable and celebrated career has spanned more than four decades.