Vaali was undergoing treatment at a private hospital for respiratory problems for a month and was on ventilator support.
Born as T S Rangarajan in the temple town of Srirangam, Vaali penned lyrics for stars across generations, from the veteran M G Ramachandran (MGR), Kamal Haasan to present day heroes like Dhanush. He worked with star composers of Tamil cinema like M S Viswanthan and AR Rahman.
Having started in the mid-60s, Vaali went on to pen nearly 10,000 songs in his five-decade-long career.
Vaali also acted in a few movies including veteran K Balachander-directed 'Poikal Kuthirai' and Kamal Haasan's 'Hey Ram'.