Watch: Karan Johar, Varun Dhawan, Vicky Kaushal and other celebs ace Ayushmann Khurrana's and Amitabh Bachchan’s ‘Gulabo Sitabo’ tongue twister challenge

After Amitabh Bachchan and Ayushmann Khurrana left netizens on a laugh riot with their latest Gulabo Sitabo tongue twister challenge, several Bollywood stars have joined the fun challenge. Karan Johar,.....