Singh acting debut was in the SAB TV series Left Right Left as Cadet Aakriti Bhat. She was next seen in Zee TV's Meri Doli Tere Angana and Ghar Ki Lakshmi Betiyaan. In 2009, she starred on Colors TV's Uttaran as Kukki, and next year, she entered Colors TV's social drama Na Aana Is Des Laado as Amba Sangwan before her exit from it in 2011.
Singh collaborated with Colors TV third and consecutive time, for Phulwa. She begun 2013 with Life OK's 26/12 in the character of Shahana Malik and next bagged Adaalat. It was followed playing Meghna Singhania in Sasural Simar Ka on Colors, and then she enacted brave girl warrior Shikhandi in epical TV series Mahabharat; both roles were from 2013 to 2014.
From 2014 to 2020, Singh portrayed the appreciative character Alia Mehra in Kumkum Bhagya; between this she was cast for the same role on its spin-off Kundali Bhagya, and also she was cast in Chandra Nandini on Star Plus and &TV's popular episodic Laal Ishq as Vibha.
Apart from acting, Singh appeared as herself in Sony Entertainment Television's Jubilee Comedy Circus (2008). She anchored the channel exchanging series Gold Safe (2009–10). She was seen on Comedy Nights Bachao in 2015 & 2016.
|2007–2008||Left Right Left||Cadet Akriti Bhatt|
|2008||Jubilee Comedy Circus||Herself|
|2008||Meri Doli Tere Angana||Amrapali|
|2009||Ghar Ki Lakshmi Betiyann||Payal|
|2009–2010||Gold Safe||Anchor/Phone operator|
|2010–2011||Na Aana Is Des Laado||Amba Sangwan|
|2013–2014||Sasural Simar Ka||Meghna Singhania|
|2014||Pavitra Rishta||Season finale special guest|
|2014–2020||Kumkum Bhagya||Alia Mehra Khanna|
|2015||Comedy Nights Bachao||Herself|
|2015–2016||Pyaar Ko Ho Jaane Do||Shabina Khan|
|2016||Box Cricket League||Herself (season 2)|
|2016||Comedy Nights Bachao||Herself|
|2017–2018||Kundali Bhagya||Alia Prem Mehra|
|2018||Box Cricket League||Herself (season 3)|
|2019||Box Cricket League||Herself (season 4)|
- "Kumkum Bhagya's Shikha Singh spends birthday in the wild; shares pics – Times of India". The Times of India. 8 February 2019. Retrieved 4 December 2019.
- "Shikha Singh Shah (@shikhasingh) • Instagram photos and videos". www.instagram.com. Retrieved 12 October 2020.
- "Would love to play Komolika, says Shikha Singh". Zee News. 11 December 2012. Retrieved 15 September 2014.
- India, Press Trust of (19 April 2014). "TV actress Shikha Singh approached for Jhalak Dikhla Jaa". Business Standard India. Retrieved 15 September 2014.
- Chaubey, Pranita (23 April 2020). "Kumkum Bhagya Actress Shikha Singh And Karan Shah Are Expecting First Child Together". NDTV.com. Retrieved 18 December 2020.
- Shikha Singh | Left Right Left
- Anil Wanvari. "Left Right Left comes to a halt". Retrieved 15 September 2014.
- "TV actress Shikha Singh approached for 'Jhalak Dikhla Jaa 7'". IBNLive. Archived from the original on 24 April 2014. Retrieved 15 September 2014.
- "TV actress Shikha Singh approached for Jhalak Dikhla Jaa". The Indian Express. 20 April 2014. Retrieved 15 September 2014.
- "Shikha Singh return with Chabbis Gyarah". The Times of India. Retrieved 15 September 2014.
- Anil Wanvari. "Shikha Singh as Shahana in Life OK's 26-13". Retrieved 15 September 2014.
- "Shikha Singh happy to create a niche with Mahabharat". The Times of India. Retrieved 15 September 2014.
- "Shikha Singh to play Shabbir Ahluwalia's girlfriend in Kumkum Bhagya?". dna. 9 April 2014. Retrieved 15 September 2014.
- "'Kumkum Bhagya' actor Shikha Singh & husband Karan Shah become parents to a baby girl". Republic World. Retrieved 19 August 2020.
- "'Kumkum Bhagya' actress Shikha Singh welcomes a baby girl". Free Press Journal. 17 June 2020. Retrieved 19 August 2020.
- "Shikha Singh to play a lawyer in Adaalat". The Times of India. Retrieved 15 September 2014.