Listen to The Longing - Yusuf's Theme online. The Longing - Yusuf's Theme is an English language song and is sung by Brian Keane and Omar Faruk Tekbilek. The Longing - Yusuf's Theme, from the album Kelebek, was released in the year 2017. The duration of the song is 4:07. Download English songs online from JioSaavn.