K. S. Chithra often credited as Chithra (or Chitra), is an Indian playback singer who has made her mark in the Indian (film) music playback industry. Popularly known as Chinna Kuyil (Little Nightingale) of South India, she has lent her voice to Malayalam, Tamil, Telugu, Kannada, Oriya, Hindi, Assamese, Bengali, Badaga and Punjabi films. She has recorded more than 15,000 film songs and is a recipient of six National Film Awards, five Filmfare Awards and more than thirty different state film awards. Source: Wikipedia
Who among these should retire from Bollywood?