New Delhi -- Mikas singing talent will be showcased in Ram Gopal Varmas next flick Department. Big B is quite impressed by Mikas singing off late as the song Kammo is from his upcoming movie too and stars actors Sanjay Dutt as well as Rana Daggubatti. "Mika, the voice of some of 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. "Often he sends messages of concern and affection. At times of what he does at stage shows, where he sings medley's of my songs. Grateful that he does so. I wish him the best always," Bachchan, 69, shared on his blog.