Neha Kakkar

In 2005, she participated in the second season of the singing reality show Indian Idol, in which she was eliminated early.[17]

Kakkar at the premiere event of Marathi film Janiva, 2015

In 2008, she launched her debut album, Neha The Rockstar with music by Meet Bros. Anjjan.[18] During this time, she recorded for a music album, Romeo Juliet composed by her brother, Tony Kakkar. She sang "Hai Rama" from Meerabai Not Out (2008) along with Sukhwinder Singh. The following year, she was featured in A.R. Rahman's composition, the theme song of Blue (2009), where she provided the chorus vocals for the song.[19][20] She then lent her voice for the title track of the Hindi-language soap opera Na Aana Is Des Laado (2009).[19]

In 2010, Kakkar made her screen debut with Vidhi Kasliwal's film Isi Life Mein...! (2010) in which she played the role of a college student.[21] The same year, she debuted in both the Kannada and Telugu music industry by performing a total of four tracks for Sandeep Chowta.[22][23] She lent her voice for the title track of the Kannada film Thamassu and the song "Nodu Baare" alongside Master Saleem. The former resulted in her only Filmfare Awards South nomination as the Best Female Playback Singer.[24][22]

She appeared in the second season of Comedy Circus Ke Taansen alongside Kapil Sharma and Ali Asgar.[19] The following year, her collaboration with Pritam for the dance track "Second Hand Jawaani" from Cocktail proved to be a major breakthrough for Kakkar. The song went to become popular among the music listeners, though it received mixed to negative reviews from critics.[25] In 2012, she released "SRK Anthem" on YouTube, a tribute to actor Shah Rukh Khan.[19]

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.[26] This was followed by a Sachin–Jigar's item number composed for Ramaiya Vastavaiya.[27] Titled "Jadoo Ki Jhappi". She next collaborated with Pritam for another item song, "Dhating Nach", performed alongside Nakash Aziz and Shefali Alvares.[28]

2014 saw the rise of Kakkar with the release of three popular songs.[29][30] The first release of the year was a collaboration with Yo Yo Honey Singh for the film Yaariyan. The duo collaborated once again for Bollywood's first trance number, "Manali Trance" from The Shaukeens. Her first work with Amit Trivedi, a wedding song titled "London Thumakda" was released in the same year and received positive reviews from critics. On the occasion of Mother's Day, Kakkar shot and released a song for her mother which gained a positive response among the audience.[31]

Kakkar at the audio release event of Fever, 2016

Kakkar's first release of 2015 came with "Ek Do Teen Chaar" from Ek Paheli Leela which was composed, penned and co-sung by Tony Kakkar.[32] She then collaborated with the music composer duo, Amjad-Nadeem where she performed the tracks "Naughty No 1" and "Daaru Peeke Dance" for Barkhaa and Kuch Kuch Locha Hai respectively[33] Kakkar sang the Meet Bros-composed "Tu Isaq Mera" from Hate Story 3.[34] Her last release of the year was "Tukur Tukur" from Dilwale, along with Arijit Singh, Kanika Kapoor, Siddharth Mahadevan and Nakash Aziz.[35] The same year, she featured alongside Shilpa Shetty in the video single "Wedding Da Season", composed by Amaal Malik.[36]

In 2016, she performed the popular song "Mile Ho Tum" from the film Fever, composed, written, and co-sung by Tony Kakkar.[37] Credited as the most-viewed Bollywood song on YouTube, the song received a positive response from critics and audiences. Also, she contributed to the soundtrack album of Baar Baar Dekho by performing the wedding-song "Kala Chashma" which became the "party anthem of the year".[38] 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. She also provided her vocals for an additional song in the album, "Akkad Bakkad", a rap song performed along with Badshah.[39] Apart from lending her vocals to the party song, "Kar Gayi Chull" from Kapoor & Sons, which was a remake of the Haryanvi track "Chull" and her first recording for Dharma Productions, Kakkar performed several other recreated songs during the year including, "Maahi Ve"–a remake of the song "Maahi Ve" from Kaante (2002)– and "O Janiya"–a remake of the song "Kaante Nahi Kat Te" from Mr. India (1987)–for Wajah Tum Ho and Force 2 respectively.[40]

2017 marked Kakkar's first of many collaborations with Tanishk Bagchi which resulted in the rehashing of several Bollywood songs in the coming years. Their first release, "Badri Ki Dulhania" from Badrinath Ki Dulhania performed with Dev Negi, Ikka Singh and Monali Thakur have few segments lifted from the Shankar-Jaikishen classic, "Chalat Musafir" from Teesri Kasam (1966).[41] 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.[42] This was followed by another chart-buster by the duo, "Cheez Badi" from Machine, a re-creation of the 1994-released Mohra song "Tu Cheez Badi Hai Mast Mast", which got mixed reviews from critics.[43] Her next release was the dance song "Main Tera Boyfriend" from Raabta which was a recreation of a non-film track "Na Na Na Na".[44] 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.[45] 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.[46][47] The year ended with another recreated song, "Mehbooba" from Fukrey Returns, originally performed by Mohammed Rafi for Dharam Veer (1977).

Kakkar on the show High Fever, 2018

Kakkar's first release of 2018 was Yo Yo Honey Singh's "Chhote Chhote Peg" from Sonu Ke Titu Ki Sweety, a remake of the Anand Raj Anand-composition "Tote Tote Ho Gaya" from Bichhoo (2000). This was followed by Bagchi's recreation of "Aashiq Banaya Apne" included in the soundtrack album of Hate Story 4, originally performed by Himesh Reshamiyya and Shreya Ghoshal. 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.[48][49] 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.[50][51] The trend continued with the item song "Gali Gali" included in the Hindi-dubbed version of the Kannada film K.G.F: Chapter 1.[52] During the year, she appeared as a judge alongside Anu Malik and Vishal Dadlani in the tenth season of the Indian television music competition, Indian Idol.[53]

2019 began with the release of three remade songs in collaboration with Bagchi, "Chamma Chamma", recreated for the film Fraud Saiyyan–original composition in the film China Gate (1998), while "Coca Cola Tu" from Luka Chuppi and "Hauli Hauli" from De De Pyaar De.[54][55] 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.[56][57] The trio of Kakkar, Bagchi and dancer Nora Fatehi re-united for two other chart-busters, "O Saki Saki" from Batla House and "Ek Toh Kum Zindagani" from Marjaavaan. The former being a remake of Musafir film's "Saaki", originally performed by Sukhwinder Singh and Sunidhi Chauhan.[58][59] During the year, Kakkar lent her voice for "Dheeme Dheeme", composed by Bagchi and the romantic love song "Tu Hi Yaar Mera" composed by Rochak Kohli.[60]

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.

On 12 December 2021, Kakkar performed at the Jubilee Stage at Expo 2020 in Dubai, UAE.

In 2022, she sang fewer number of songs compared to previous years . She sang "Mud Mud Ke" with Tony Kakkar , "Baarish Mein Tum" with "Rohanpreet Singh" and a few other non - film songs . From the movie "Govinda Naam Mera" , Kakkar sang the song "Bijli" with Mika Singh.