Karan Johar and the cast of his upcoming movie Student of the Year (SOTY) make an appearance in Sony Entertainment Television's KBC 6 (Big Synergy) as part of the promotional campaign. Host Amitabh Bachchan went on to tweet about it last night, Must to bed early today ... tomorrow another tough day at KBC ... film integrations always take more time .. Karan Johar and SOTY !'