Shaan was born as Shantanu Mukherjee in a Bengali family in Madhya Pradesh.
His grandfather was the lyricist Jahar Mukherjee, his father was the late music director Manas Mukherjee, and his sister is the singer Sagarika.
His father died when Shaan was 13, after which his mother found work as a singer.
His actual name is Shantanu Mukherjee, and he has sung songs in Konkani, Kannada, Bengali, Punjabi, Nepali, English, Hindi, Oriya, Malayalam, Telugu, Marathi and Assamese.
His grandfather was the lyricist Jahar Mukherjee, his father was the late music director Manas Mukherjee, and his sister is the singer Sagarika.