First Lady
noun /ˌfɜːst ˈleɪdi/
  /ˌfɜːrst ˈleɪdi/
[usually singular]- the First Lady(in the US) the wife of the President第一夫人(美国的总统夫人) 
- (North American English) the wife of the leader of a state第一夫人(州长的夫人) 
- (usually first lady)the woman who is thought to be the best in a particular profession, sport, etc.(某行业、体育运动等方面的)巾帼英雄,女杰,女冠军 - the first lady of country music乡村音乐最佳女歌手 
 
- the first lady of country music