[1] Kockar was born on 26 May 1989 in Zrenjanin, SFR Yugoslavia to mother Nadica Zeljković, who worked as a restaurant server.
[2] In November 2017, Kockar entered reality series Zadruga, aired on RTV Pink, as an anonymous personality after her husband had cheated on her with another contestant, Luna Đogani.
[2] She immediately attracted sympathies and support from the audience, eventually winning the show on 20 June the following year, with more than 55% of the public votes.
[1] After the show, she decided to pursue a career in music with her debut single "Ne vraćam se na staro", released on 20 July 2018.
Additionally, in October 2019, Kija published her autobiography, titled Moj potpis (My Signature), in which she reflected on her relationship with Radanović and her time in Zadruga.