Harshdeep Kaur was born in a Sikh family. She inherited music from her father, Savinder Singh, who owns a factory of musical instruments. At the age of six, she started learning music, mainly, Indian classical genre from Sh. Tejpal Singh, popularly known as one of the Singh Brothers. She has performed with many great names of the music fraternity like A R Rahman, Amit Trivedi, Pritam Chakroborty, Vishal-Shekhar, Salim Suleiman. Her famous numbers include Katiya Karun from Rockstar, Heer from Jab Tak Hai Jaan, Bari Barsi from Band Baaja Baaraat, Kabira from Yeh Jawani Hai Deewani, Ik Onkar from Rang De Basanti, Jugni from Cocktail and a lot more. Harshdeep is the only female to win two reality show titles.