When Karan Johar called Shah Rukh Khan 'bhai'

Karan Johar and Shah Rukh Khan

Karan Johar recently made buddy Shah Rukh Khan listen to the music of Ae Dil Hai Mushkil.

KJo tweeted, "Bhai had the best time with you last night!! @iamsrk....have sent you the song with the riff you like! Love you lots."

King Khan replied, "Ae Dil Hai Mushkil Riff is 2 die for."

SRK enjoyed the music, but since when has KJo started referring to him as Bhai?

B-Town knows only one Bhai, and I needn't say who.