Sangeetha Rajeshwaran is a renowned playback singer who predominantly lends her voice to Tamil movies. This singer was spotted by music composer and actor Vijay Antony who lend her a full support in gaining a strong foothold in cinema. In one sentence, one can even give credit to Vijay Antony for giving her right backing to make a place for herself as an independent singer in Kollywood. She is one of Kollywood singers who started her journey from reality shows.

This singer gained her foothold in the music industry by participating in a reality-based singing competition that enables one to get recognition in playback singing. Sangeetha participated in Sa Re Ga Ma Pa 2009 challenge that was aired on Zee Tamil TV channel in 2009. The budding singer then stood in semi final position. The singer got an opportunity to perform in front of notable music composers like M.S.Viswanathan and R. Noyal James (music co-coordinator to A R Rahman).

In the year 2007, the singer got her first break in the movie ‘'Dishyum' (2006) for which the soundtrack is composed by Vijay Antony. Her track included the soulful number 'Dailamo Dailamo' which had the voice of herself and Vijay Antony. The lyrics for this song was written by Vijay Antony. Her next assignment was for 'Naan Avanillai' (2007) in which the singer has given her voice for two songs. The lyrics of her songs were written by Pa. Vijay. In this movie, there was one group song titled "Aen Enakku Mayakkam" which had other singers’ support too and they included notable singers like Jayadev, Sangeetha Rajeshwaran, Megha, Ramya, Sheepa. Another group song that Sangeetha had sung in this movie included the famous number "Radha Kadhal" which had voices of V. V. Prasanna, Maya, Sangeetha Rajeshwaran, Vinaya and this song was penned by Kannadasan. In the year 2009, when 'Vettaikaaran' released, composer Vijay Antony gave this singer another chance to sing the peppy number "Karigalan Kala" which was a duet song and sung by Suchith Suresan and Sangeetha Rajeshwaran, and for this song, the lyrics were penned by Kabilan. This famous peppy number was picturized on Vijay and Anushka Shetty in town Pollachi. In the year 2011, a film named "Velayudham" got released and this film boasted of star casts like Vijay, Genelia D'Souza, Hansika Motwani, Abhimanyu Singh, and Saranya Mohan. In this movie, Sangeetha had sung a solo number "Mayam Seidhayo" which was penned by Vivega. The song was picturized on actor Vijay and Hansika Motwani. In the year 2011, a film named ' Vedi' got released. Sangeetha got another chance to sing a duet song with Vijay Antony, and this peppy number was "Ichu Ichu" which was penned by Vaali and music was composed by Vijay Antony. This singer also had lent her voice for a title song "Ennai Thedi Kadhal" which was for the serial’ Kadhalikka Neramillai’ aired on Vijay TV and directed by Raja. The serial was aired on the air in 2007 and had music composition by Vijay Antony.