Singer Diljit Dosanjh shook 'Badhaai Ho' actor Gajraj Rao's hand after spotting him during his concert in UK's London. In a video Diljit shared on Instagram Story, he was seen bowing in front of Gajraj before saying, "Big fan sir, big fan." Gajraj was also seen kissing Diljit's hand while the latter sang his song 'Ishq Mitaye'.