Question: What multilingual singer is known for her work in pre-recorded songs for use in Indian films? 

Context paragraphs:
Masala film: Masala films of Indian cinema are those that mix genres in one work.  Typically these films freely mix action, comedy, romance, and drama or melodrama.  They also tend to be musicals that include songs filmed in picturesque locations.  The genre is named after the masala, a mixture of spices in Indian cuisine.  According to "The Hindu", masala is the most popular genre of Indian cinema.  Masala films have origins in 1970s Bollywood (Hindi) films, and are most common in Bollywood and South Indian films.

Playback singer: A playback singer is a singer whose singing is pre-recorded for use in movies.  Playback singers record songs for soundtracks, and actors or actresses lip-sync the songs for cameras; the actual singer does not appear on screen.

K. J. Yesudas discography: K. J. Yesudas is a multilingual singer, singing Indian classical music, devotional, light music, and Film songs.  His commercially published recordings span multiple genres.

History of VFX in Indian Films: The History of VFX in Indian Films dates back to the silent era.  At the same time as hollywood films were experimenting and executing VFX, India had also closely followed and caught on.  Dada Saheb Phalke's silent movie Kaliamardhan in the year 1919 is one such example with amazing work.  Later came Telugu cinema like Pathala Bhairavi and Maya Bazaar which took VFX to greater heights.  With the advent of Computer Graphics in hollywood in the 1970s Indian films yearned to similar work and in the 1980s India's first Computer graphics facilities came up led by Prasad Video Digital which later gave birth to Prasad EFX who imported the first film scanners and recorders to India and thus pioneered the digital image revolution in India.The first complete computer graphic film was a Telugu movie AMMORU in which the graphics were by hollywood technician christopher stanley holmes.

Wedding music: Wedding music applies to music played at wedding celebrations, including the ceremony and any festivities before or after the event.  The music can be performed live by instrumentalists or vocalists or may use pre-recorded songs, depending on the format of the event, traditions associated with the prevailing culture and the wishes of the couple being married.

I. V. Sasi: Irruppam Veedu Sasidaran, better known as I. V. Sasi, is an Indian film director who has made over 150 Indian films in various languages and genres.  He is known for his South Indian films of the 1970s, 1980s, and 1990s, primarily Malayalam films, although he directed Hindi films during the 1980s as well.

List of multilingual Indian films: This is a list of multilingual Indian films.  The majority of films listed have been shot simultaneously alongside each other as a part of the same project—rather than being remade or dubbed at a latter date.

Rosy Armen: Rosy Armen (Armenian: Ռոզի Արմեն ) is a French singer of Armenian descent.  She is a multilingual singer, with most songs in French and Armenian, but also in other languages such as English, German, Spanish, and Italian.

Sangeetha Rajeev: Sangeetha Rajeev also known as SaRa is a multilingual singer, composer and performer from India.  She is a Playback singer in Indian films.  Besides being a performer, she is also an Independent musician who released her latest Hindi single Chan Se Udi in 2016 which was featured in BBC Asian Network, Pepsi MTV Indies and Radio City (Freedom Radio).  Known for her electrifying yet graceful presence, she is credited with over 1000s of live performances worldwide so far and is a very popular singer in the performance space Her extremely energetic stage performances makes her the most wanted name in the event industry.

Mashup (music): A mashup (also mesh, mash up, mash-up, blend, bootleg and bastard pop/rock) is a song or composition created by blending two or more pre-recorded songs, usually by overlaying the vocal track of one song seamlessly over the instrumental track of another.  To the extent that such works are "transformative" of original content, in the United States they may find protection from copyright claims under the "fair use" doctrine of copyright law.

Supporting paragraphs: Sangeetha Rajeev Playback singer
Answer: Sangeetha Rajeev