The Country Music Hall of Fame and Museum has begun updating its core exhibit, Sing Me Back Home: A Journey Through Country Music. The second floor of the exhibit has been redecorated with vibrant, oversized portraits of country music's famous duet partners -- Loretta Lynn and Conway Twitty, Tammy Wynette and George Jones, and Dolly Parton and Porter Wagoner. Other items newly on display include Parton's handwritten lyrics to "Jolene," the acoustic guitar used by Tom T. Hall to write "Harper Valley P.T.A." and Dottie West's glamorous stage costume designed by Bob Mackie. Other items from Ronnie Milsap, Johnny Paycheck, Kenny Rogers, Mel Tillis and Tanya Tucker are also now on display. Updates will continue through May.