Singer Mika Singh has sung a peppy wedding song "Kammo" for Amitabh Bachchan in "Department", and the megastar is mighty impressed. He feels Mika has a unique voice

"Mika, the voice of some our most popular songs in the industry, has done another one for me - 'Kammo' in 'Department'.

He has a unique different voice, which I have been following from the time of his early numbers he did, soon after his elder brother Daler Mehndi, hit the charts, " Amitabh wrote on his blog.

Mika has been the voice of many chartbusters including "Mauja hi mauja", "Dhinka chika", "Subah hone na de" and "Pyaar ki pungi".

"Often he (Mika) sends messages of concern and affection. At times of what he does at stage shows, where he sings medleys of my songs. Grateful that he does so. I wish him the best always, " added Big B.