Singh's musical career began when his guru Rajendra Prasad Hazari, who felt that "Indian classical music was a dying tradition", insisted he leave his hometown and participate in the reality show Fame Gurukul (2005) at the age of 18. He approached the finals of the programme but was eliminated by audience polling, finishing in sixth place.  During the show, filmmaker Sanjay Leela Bhansali recognised his talent and had him sing "Yun Shabnami" a song scheduled to be used in his upcoming film Saawariya. During production, the script changed and the song was no longer required. It was never released. After the Fame Gurukul, Kumar Taurani, the head of Tips, signed him for an album which was never released.  He won another reality show 10 Ke 10 Le Gaye Dil. He chose to move to Mumbai in the 2006 to freelance, staying in a rented room in the Lokhandwala area of the city. He invested the prize money from 10 ke 10 Le Gaye Dil to build his own recording studio. He became a music producer and began composing music and singing pieces for advertisements, news channels and radio stations.  Singh spent part of his early musical career as a music programmer and music producer for music directors such as Shankar-Ehsaan-Loy, Vishal-Shekhar, Mithoon, Monty Sharma and Pritam. While working with other composers he supervised the vocals, and the chorus sections. But it was while working with Pritam, that he began to produce and program music by himself.  About his early life struggles, he said, "One has to suffer pain to reach their destination, those days when I failed to get work, I thought about quitting and going back in my hometown, but I realised that one should concentrate on one's work no matter what happens." On his move from the small village of Jiaganj to a city like Mumbai he later said, "Mumbai is a place which is made up of small town boys and girls who come to Mumbai to try their luck, but what counts is 'hard work'".

Answer this question "What songs did he write?" by extracting the answer from the text above.
"Yun Shabnami