Country music will receive considerable representation on this month's Grammy Awards CBS-TV program. The Dixie Chicks and Faith Hill have signed on as performers, and Vince Gill is among the first names announced to be presenters, for the 42nd Annual Grammy Awards telecast on Feb. 23 in Los Angeles. Additional performers include Britney Spears, Kid Rock, Whitney Houston, Ricky Martin, Santana, Backstreet Boys, TLC and Elton John. Joining Gill handing out the coveted awards will be Christina Aguilera, Mary J. Blige, Neil Diamond and Gloria Estefan. More names will be added to the list.