Gary Clark Jr.  Photo: Latisha Alsys For Drfunkenberry.com Gary Clark Jr. walked away with a Grammy on Sunday for "Best Traditional R&B Performance" for "Please Come Home" and is set to perform on David Letterman and also tour with Kings Of Leon. Gary also showed off his guitar skills at the Grammy's performing with Keith Urban. Clark Jr. will be performing on Late Night With David Letterman February 17th. He will open for Kings Of Leon in Feb. and into March. For tour dates, click here....