This three-hour documentary honors 40 men who have made unforgettable contributions to an entire music genre. To create the exciting three-hour countdown from No. 40 to No. 1, the special also includes performance footage, historic photos and the timeless music these men have made over the years. Each hour will draw viewers closer to knowing which artist will be honored as the ""Greatest Man of Country Music."" The three-hour tribute includes interviews with Shania Twain, Garth Brooks, Jay Leno, Faith Hill, Sheryl Crow, Melissa Etheridge, Merle Haggard and John Corbett (Sex & the City and My Big Fat Greek Wedding) and many other celebrities from country music and other entertainment genres and is hosted by Megan Mullally (Karen on Will & Grace).