[4][5] Jovanović made her first public appearance in 2010 by competing alongside her mother on the reality TV series Survivor Srbija VIP: Philippines, where she was the first contestant to be voted out.
[8] At the beginning of 2011, Nikolija released her first song "Crazy 2 Night" featuring DJ Kas under the stage name "Nicole", but failed to make a significant success.
[9] After graduating from college, Nikolija relocated back to Serbia where singer Milan Stanković introduced her to the prominent songwriters and producers Nebojša Arežina and Marko Perunučić, who would become her frequent collaborators.
[10] She came on to the Serbian music scene with the house-influenced single "Ćao zdravo" featuring MC Techa, released in April 2013 under IDJTunes.
[11] During the summer of 2013, she rose to further prominence after she had been featured on the song "Milion dolara" by Ana Nikolić, which also served as the title track for her fourth album.
[12] In March 2014, Nikolija was announced as a contestant of the Serbian spin-off of Dancing with the Stars,[13] where she finished in 8th place after six weeks of competing.
Same month, it was revealed that Nikolija would star in the dystopian action film Volja sinovljeva, directed by Nemanja Ćeranić.
[33] She was subsequently signed to the newly established record label, Made In BLKN, founded by Relja Popović in distribution deal with IDJTunes.
[40] On 15 March 2024, Nikolija released her fourth studio album, Lavina, to digital services through Made In BLKN Records.
Four tracks from Lavina also simultaneously debuted on the Billboard's chart in Croatia, whilst "Nenormalan lik" with Devito took the highest position, peaking at number three.
[43][44] Jovanović has been in a relationship with actor, musician and former member of Elitni Odredi, Relja Popović, since they collaborated on the single "Alkohola litar" in 2014.
[48][8] On the topic of cyberbullying, Nikolija has been vocal about online harassment she has received when her relationship with Popović was alleged to be the reason behind the breakup of Elitni Odredi in early 2015.
[49] In April 2023, Jovanović received overwhelming praise for her honesty and transparency after she had opened up on TikTok about her much speculated past plastic surgeries and her developing relationship with her own body acceptance.