The 51st annual Country Music Association Awards kicked off with a tribute to the victims of last month’s Las Vegas tragedy. Darius Rucker led an all-star group of country superstars in a rendition of his Hootie and the Blowfish hit “Hold My Hand.” On stage with him was a who’s-who of the country world including Keith Urban, Lady Antebellum, Tim McGraw & Faith Hill, Garth Brooks, Reba McEntire and more. CMA Awards hosts Carrie Underwood and Brad Paisley only paid tribute…