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Gretchen is the third member of the maverick MuzikMafia movement to hit this year's Nashville Star. Her buddies Big & Rich perform on the series premiere, March 14, and also serve as celebrity judges. Plus, MuzikMafia member, and rising solo act, Cowboy Troy joins Wynonna to co-host this year's country talent series. The 2006 Nashville Star competition kicks off Tuesday, March 14, on USA Network, at 10:00 p.m. ET.