Adi's mimicking was pretty bad. The whole point of mimicking is to imitate someone and only god knows who Adi was trying to imitate as it surely didn't look like Sonu Nigam. And if you see the video again Sonuji also had a weird expression to his mimicing. His tapoori and gujrati styles sounded fake. I don't understand why he even bothers to act as it so doesn't look good!
I dont know which Aditya you were watching but the one iwas watching was doing a good job... Sonu was actually enjoying waht Adi was doing and didnt have ne "funny expression"... the point to Adi's mimicing was to show how Sonu Nigam used to extend words like saregamaaaaaa and he did a great job... obv Adi knew he couldnt go too far cause it IS Sonu Nigam and he didnt wanna be disrespectful im sure...