Sudeepa Singh, lived in Amritsar all her life and planned to join the civil services, participated in the music contest only because the initial auditions happened in her home town. She stayed on for longer and participated in the Zee Cine Star ki Khoj talent contest, where young, new and upcoming artistes battled for a title that would place them in a new show on the Hindi general entertainment channel. Singh reached the final.
She was spotted by Gyan Sahay, the director of photography of the 2004 Zee Antakshari TV competition. Sahay persuaded her to participate in the reality (music) show on Zee.
After the show, which ended in 2005, offers for television serials were made. In "Kabhie Toh Nazar Milao", she played the role of visually-impaired Sunaina. She also acted in another popular soaps "Ardhangini". She had made her first Bollywood movie, "Action Replayy" along with Akshay and Aishwarya. In 2004, she won runnerup in "Zee cine star ki khoj" competition. She has also acted in a punjabi movie named "Yaaran Naal Baharan" in 2005 with other actors Jimmy Shergill, Juhee Babbarr and Gurpreet Ghuggi.
Her first TVC was for Tide detergent, titled Chunaari Chunaari. She worked in the Kellogg's weight loss challenge advert, a Virgin Mobile ad (video recording) and an Airtel Digital TV ad. She has also appeared in Santoor, LIC, Amul ice cream and Emami advertisements.