choirgirl       
noun [ C ] uk/ˈkwaɪə.ɡɜːl/ us/ˈkwaɪr.ɡɝːl/
 唱诗班女孩
a girl who sings in a church choir
  She joined the church choir at seven and by nine, she was head choirgirl. 她七岁加入教堂唱诗班,九岁时成为唱诗班的首席。 
 - More examples
 - Whitney Houston turned from church choirgirl to superstar.
 - Katherine Jenkins is the Welsh choirgirl who won a scholarship to the Royal Academy of Music and then, at 23, was offered the biggest record deal in classical music history.
 - She may look tough, but in person she is a well-mannered former choirgirl.
 - Dressed in a cream blouse and flat shoes, with her hair tied back in an Alice band, she couldn't look more like a choirgirl if she tried.