Veteran playback singer S Janaki has died at a private hospital here due to age-related ailments, sources said on Saturday.She was 88 years old.According to sources, she developed breathing issues last night and was subsequently admitted to the hospital.Known for her versatility, Janaki recorded over 48,000 songs in multiple languages, predominantly the South Indian languages of Kannada, Tamil, Telugu and Malayalam.Over a career spanning six decades, she sang for films, albums, television and radio in about 20 Indian languages, including Hindi, Odia, Tulu, Urdu, Punjabi and Bengali.