Singer Mika Singh took to social media to share a picture with his brother Daler Mehndi on the occasion of his 50th birthday on Friday. "Happy #birthday to the living #legend the real #pop #star of #india My big #brother #Dalermehndi...love you bhaaji," wrote Mika. Mehndi is known for singing songs like 'Bolo Ta Ra Ra' and 'Tunak Tunak Tun'.