Listen to Key Uthey Daki Mamo online. Key Uthey Daki Mamo is a Bengali language song and is sung by Rezwana Chowdhury Banya and Rabindranath Tagore. Key Uthey Daki Mamo, from the album Dwar Kholo Hey Dwar Kholo, was released in the year 2016. The duration of the song is 9:21. Download Bengali songs online from JioSaavn.