Question: Which Pakistani musician originally sung Samjhawan for the Punjabi film "Virsa"?
Context: Killer Punjabi is a Punjabi mystery-action-thriller featuring Pooja Batra alongside Gulshan Grover, Kailey Rav and Jasbir Gill.  Filmed mostly in Los Angeles, it was directed by Lakhvir Bansi.  "Killer Punjabi" is the first Punjabi film shot in a Hollywood style.  This film is a debut Punjabi film of Hollywood and Bollywood actress Pooja Batra. The PTC Punjabi Film Awards are presented annually by PTC Punjabi to honour both artistic and technical excellence of professionals in the Punjabi Cinema.  The PTC Punjabi Film Awards ceremony is the most awaited film award function in Punjabi Cinema. "Samjhawan" is a romantic song from the 2014 Bollywood film "Humpty Sharma Ki Dulhania".  Re-created by Sharib−Toshi, the song is sung by Arijit Singh and Shreya Ghoshal, with lyrics by Ahmad Anees and Kumaar.  The song was originally composed by Jawad Ahmad and sung by Rahat Fateh Ali Khan for the Punjabi film "Virsa".  An "unplugged" version of this song sung by the leading actress of the film, Alia Bhatt, was released on 2 July 2014. Aman Singh Dhaliwal (Punjabi: ਅਮਨ ਸਿੰਘ ਧਾਲੀਵਾਲ ; born 24 July 1986) is an international model-turned-actor, who works in Punjabi cinema, where he is known as action hero.  He belongs to a small rural town, Mansa, Punjab.  Best known for his changing looks with each role, he has worked in Bollywood, Pollywood, Pakistani and Telugu movies including Big Brother (Bollywood, 2007) Jodhaa Akbar(Bollywood,2008), Coffee House (Bollywood,2009), Virsa(Pakistani, 2010), Ik Kudi Punjab Di (Punjabi Cinema, 2010), Khaleja (Telugu, 2010), Indian Police (Telugu, 2011)and Ajj De Ranjhe (Reliance production Punjabi Cinema,2012) Leather Life (punjabi Hindi , eng) ))Jatt boys putt jattan de " ( punjabi ) ) SAKA (Martyrs) (punjabi , English ) Rahat Fateh Ali Khan (born 1974), is a Pakistani musician, primarily of Qawwali, a devotional music of the Muslim Sufis.  He is the nephew of Nusrat Fateh Ali Khan and son of Farrukh Fateh Ali Khan and also the grandson of Qawwali singer Fateh Ali Khan.  In addition to Qawwali, he also performs ghazals and other light music.  He is also popular as a playback singer in Bollywood and the Pakistan film industry. Simerjit Singh (born 1973 in Punjab) is an Indian film director and writer.  He was born and brought up in Moga district of Punjab.  He is best known for directing the hugely successful Punjabi film Angrej (2015) starring Amrinder Gill, Aditi Sharma, Sargun Mehta, Ammy Virk and Binnu Dhillon as the main cast of the film and it became second highest-grossing Punjabi film in 2015 and the fourth highest-grossing Punjabi film of all time.  He got selected in top 5 Directors of Pollywood in a survey by an organation.  He completed his graduation in commerce from Chandigarh University in 1993. Romeo Ranjha is a 2014 Punjabi language Indian action comedy film Starring Jazzy B and Garry Sandhu written by Dheeraj Ratan, directed by Navaniat Singh, who also directed Singh vs Kaur.  Romeo Ranjha is produced by Gunbir Singh Sidhu and Manmord Sidhu with Hansraj Railhan as Co-Producer.  Allan amin one of the most acclaimed action director of Bollywood who also directed the action in Dhoom, Race etc.  Was roped in to Direct the action sequences for the movie.The film was first of its kind in terms of action sequences in "Punjabi film industry" with all the 36th floor jumping sequence and the car blast and the chase scenes for the first time in a Punjabi movie.  In spite of many loopholes in the story and overall movie it got Navaniat Singh praise for his "Brave Attempt " and established him as a trendsetting director of Punjabi film industry. Born Kishwar Begum, Bahar Begum (born c. 1942) is an actress best known for many Pakistani movies since 1956. She was first introduced to the Pakistani film industry by the renowned film director Anwar Kamal Pasha in film Chann Mahi (1956). Anwar Kamal Pasha is the one that gave her the professional film world name Bahar Begum.She later acted both in Punjabi and Urdu language Pakistani films and had a very active career from 1956 through the 1980s. She has more than 500 films to her credit.  Having grown up in Lahore, Pakistan, her career has centered on the Punjabi film industry, initially playing heroines and then "emotionally strong mothers", usually ending-up playing 'mother' to popular lead actor of Punjabi films Sultan Rahi in his films during the 1980s. Nanak Naam Jahaz Hai (Punjabi: ਨਾਨਕ ਨਾਮ ਜਹਾਜ਼ ਹੈ ), is a 1969 National Award winning Punjabi film directed by Ram Maheshwary, starring Prithviraj Kapoor, I. S. Johar, Nishi and Vimi in lead roles.  The devotional film is based on a true incident which took place at Golden Temple, Amritsar.  The film was awarded the 1970 National Film Award for Best Feature Film in Punjabi, and National Film Award for Best Music Direction, plus it was the first major hit Punjabi film of post-independent India. Akashdeep Singh Batth (born 30 January 1992) is an Indian Punjabi film director, producer, author and screenwriter.  Batth made his directional debut with "Myself Ghaint "(2014).  In 2011, Batth became a published author with his English fiction "Anhad -The Man on Mission".  Akashdeep was 18 years old when he first published his English fiction and 22 years old when he released his first Punjabi feature film, "Myself Ghaint", thus becoming the youngest film director in the Punjabi film industry.
Answer: Rahat Fateh Ali Khan