Apart from playback singing, Kakkar has appeared in several music videos and as a judge on several television reality shows, including "Indian Idol".

[21][22] She lent her voice for the title track of the Kannada film Thamassu and the song "Nodu Baare" alongside Master Saleem.

[18] The following year, her collaboration with Pritam for the dance track "Second Hand Jawaani" from Cocktail proved to be a major breakthrough for Kakkar.

[18] Kakkar's first release of 2013, "Botal Khol" from Prague, met with controversy, where Central Board of Film Certification raised objections on the song citing that its lyrics contain double meaning.

She next collaborated with Pritam for another item song, "Dhating Nach", performed alongside Nakash Aziz and Shefali Alvares.

Her first work with Amit Trivedi, a wedding song titled "London Thumakda" was released in the same year and received positive reviews from critics.

[34] The same year, she featured alongside Shilpa Shetty in the video single "Wedding Da Season", composed by Amaal Malik.

[35] In 2016, she performed the popular song "Mile Ho Tum" from the film Fever, composed, written, and co-sung by Tony Kakkar.

[37] She worked with Epic Bhangra for the film Sanam Re, where they released the song "Humne Pee Rakhi Hai", a mix of club and EDM.

[40] The version became an instant chart-buster among the audience and was included in the list of most-viewed Indian videos on YouTube with over 500 million views.

[43] The trend was carried forward with Judwaa 2 where she rendered two remake songs, co-composed by Sandeep Shirodkar and Anu Malik and one original song composed by Meet Bros.[44] During the year, she appeared as a judge alongside Himesh Reshammiya and Javed Ali in the sixth season of the Indian television music competition, Sa Re Ga Ma Pa L'il Champs.

[45][46] The year ended with another recreated song, "Mehbooba" from Fukrey Returns, originally performed by Mohammed Rafi for Dharam Veer (1977).

This was followed by Bagchi's recreation of "Aashiq Banaya Aapne" included in the soundtrack album of Hate Story 4, originally performed by Himesh Reshammiya and Shreya Ghoshal.

[citation needed] The duo collaborated on five other projects, from which "Dilbar" from Satyameva Jayate and "Aankh Maarey" from Simmba became popular with music listeners, both songs reaching the list of most-viewed Indian videos on YouTube and the former being the first Indian song to reach number three on the Billboard YouTube Music Chart.

[47][48] Apart from rendering the folk pop song "Dholida" from Loveyatri alongside Udit Narayan and Palak Muchhal, Kakkar performed a traditional-themed-contemporary Punjabi track, "Bhangra Da Sajda" from Veere Di Wedding, composed and co-sung by Shashwat Sachdev.

[53][54] The year marked her first collaboration with Vishal Mishra and Vishal–Shekhar, where she performed the female version of "Ki Honda Pyaar" from Jabariya Jodi for the former and "The Hook Up Song" for the latter, which was well received by critics.

[59] From 2017 on, Kakkar, primarily, in collaboration with Tanishk Bagchi, became more associated with the trend of remaking old to very recent songs, which resulted in several backlashes targeted for the singer.

Several Indian classics and pop songs like Kavita Krishnamurti's "Tu Cheez Badi Hai Mast Mast" and "Tip Tip Barsa Paani", Himesh Reshammiya's "Aashiq Banaya Aapne", Falguni Pathak's "Yaad Piya Ki Aane Lagi", Lata Mangeshkar's "Kaanta Laga", Alka Yagnik's "Chamma Chamma", Poornima's part of "Chalti Hai Kya 9 Se 12", Payal Dev's "Sawan Me Lag Gayi Aag", and several others.

[60] Most recently she plagiarised a full theme and harmony of Indian classic singer Falguni Pathak's "Maine Payal Hai Chhankai"(1999) and remade a version named "O Sajna".