Rita Wilson to host Kenny Rogers special on CMT...The CMT Music Awards postponed... CMT has announced that actress, singer and songwriter Rita Wilson will host the upcoming CMT GIANTS Kenny Rogers: A Benefit for MusiCares.The special is set to air this Wednesday at 8 p.m. on CMT and it will celebrate the life and music of Kenny Rogers through stories and songs from his peers and friends. The lineup includes Dolly Parton, Jennifer Nettles, Lady Antebellum, Lionel Richie, Michael McDonald, Randy Houser, Rascal Flatts, Vince Gill, members…