New Delhi, Oct 23 (ANI): Bollywood celebs have expressed their grief over the sudden death of the ‘London Thumakda’ singer Labh Janjua after he was found dead under mysterious circumstances at his Mumbai residence. Celebrities like Ayushmann Khurrana, Pritam, Sunidhi Chauhan and Shaan took to Twitter to mourn the tragic demise of Punjabi singer, calling it a big loss to the Indian music industry. According to reports, Mumbai Police have already started investigating the case. The late 57-year-old singer shot to fame with his song ‘Mundeyan Ton Bach Ke Rahin.' His other hits include ‘Dance Pe Chance’ from ‘Rab Ne Banaa Di Jodi,' ‘Soni De Nakhre’ from ‘Partner’ and ‘Jee Karda’ from ‘Siingh is King’ among others.