1924–40 Begum's talent was first spotted by her principal when she was in primary school in 1924. Impressed by the quality of her voice, she was made head singer of classroom prayer. At 10, she started singing folk-based songs at religious functions and family marriages. She received no formal musical training. Her singing ambitions, which she held from 1929, met with opposition from her family. In 1931, when she was twelve, her uncle, who enjoyed
qawwalis and
ghazals, secretly took her to Jenophone (or Xenophone) Music Company for an audition with Lahore-based musician and composer,
Ghulam Haider. Begum said in an interview, "I sang Bahadur Shah Zafar's (the poet-ruler) ghazal
Mera yaar mujhe mile agar." An impressed Haider gave her a contract for twelve songs, with the same facilities provided to top singers. It was Begum's paternal uncle Aamir Khan who convinced her father, Miyan Hussain Baksh, to allow her to sing. When she won a contract with a recording company, her father agreed to let her sing on the condition that she would record in a
burka and not allow herself to be photographed. She earned 15
rupees per song and was awarded 5,000 on the completion of the contract on Xenophone. Xenophone was a renowned music recording company, patronised by the rich, and her popularity grew in elite circles in the early 1930s. Though she had won the Xenophone audition without having any formal music training, Hussain Bakshwale Sahab and later Ghulam Haider improved her singing skills between 1937 and 1939. The then
AIR Lahore helped her to enter the world of movies as they frequently broadcast her songs, which induced music directors to use her voice for their films. Begum also recorded
naats and other devotional music for a couple of gramophone recording companies. Her crystal-clear voice caught the attention of
sarangi maestro Hussain Bakshwale Saheb, who took her as his disciple. Her father was not convinced at first but later gave in as Shamshad wanted to come to Mumbai. Haider used her voice skilfully in some of his earlier films such as
Khazanchi (1941) and
Khandan (1942). By 1940, Begum was already well established on the radio. The songs "Cheechi Wich Pa ke Chhalla", "Mera Haal Vekh Ke" and "Kankaan Diyaan Faslaan" from
Yamla Jatt of 1940 became a huge hit and popularised
Pran, singer Begum and composer Haider. Haider continued to compose hit songs which Begum sang for films including
Zamindar,
Poonji and
Shama. Khan used Begum's voice in
Taqdeer (1943), where he introduced
Nargis as the heroine. Begum was soon singing for other composers including Rafiq Ghaznavi, Ameer Ali, Pt. Gobindram, Pt. Amarnath, Bulo C. Rani, Rashid Atre and M. A. Mukhtar, in the pre-independence era. When Haider moved to
Bombay in 1944, Begum went with him as a member of his team, leaving behind her family and staying with her
Chacha (paternal uncle) Aamir Khan who used to encourage her in her singing career. Begum is credited with singing one of the first Westernised songs, "Meri jaan...Sunday ke Sunday" by C. Ramchandra. She kept getting more offers to sing songs and was the highest paid female singer from 1940 to 1955 and again post Mother India in 1957 to 1964. In 1949, music directors S. Rajeswara Rao, M. D. Parthasarathy and Balakrishna Kalla asked her to sing "Jaiyo Jaiyo Shipayon Bazar" for
P. Bhanumathi in the film
Nishan, produced by Gemini Films of Madras, which became highly popular. Although Burman started composing Bengali music in 1937, he achieved national fame with tracks sung by Begum in Hindi films. Burman was not well established as a music director in Hindi films until 1946; he then asked Begum to sing in his debut Hindi film as music director,
Shikari (1946), with the song, "Kuch Rang Badal Rahi". In 1949, came
Shabnam, in which Burman asked her to sing duets named "Pyar Main Tumne" and "Kismat Bhi Bhichadna" with
Mukesh, which became popular.
Shabnam was Burman's biggest hit to that date with
Filmistan, and was especially noticeable for its multilingual song "Yeh Duniya Roop ki Chor", sung by Begum and acted by
Kamini Kaushal, which became another hit. Burman subsequently asked her to sing tracks in
Bazar,
Mashaal,
Bahar,
Shahenshah,
Miss India, and other films. The song "Jaam Tham Le" from
Shahenshah was a trendsetter for Burman compositions. It was between 1958 and 1963 that the career of Lata got a major boost as music directors started gradually preferring her soft voice. Until then, Geeta Dutt and Begum were the most preferred singers, but Shamshad Begum continued to be at the top from 1940 until 1963. From 1965, her songs started to be mimed by actresses other than the lead. Beginning in 1965, songs for her in films started getting reduced but the songs she sang instantly became hits through 1968. She then declared a self-imposed retirement in 1965. But she kept having certain composers asking her to sing songs in few films and among them her songs from films like in
Daku Mangal Singh,
Upkar,
Kismat,
Heer Ranjha,
Johar Mehmood in Hong Kong,
Teri Meri Ik Jindri and
Main Papi Tum Bakhshanhaar. Her song "Kajra Mohabbat Wala" from the 1968 film
Kismat and "Nathaniya Hale To Bada Maza" from the 1971 film
Johar Mehmood in Hong Kong remains popular. ==Retirement and death==