Kevin Costner has signed to host an upcoming special on CMT.The program, CMT Artist of the Year, will celebrate the new wave of top-selling country music acts, reports The AP.The 90-minute special will honor stars including Taylor Swift, Carrie Underwood, Jason Aldean, the Zac Brown Band and Lady Antebellum.Costner, an Oscar-winning director and actor, also sings in the country band Modern West.