[3] Kostić admires Beyoncé Knowles, Alicia Keys, Anastacia, Lauryn Hill, Toše Proeski, and Dino Dvornik.
After series of additional competitions, broadcast on Operacija trijumf special show, the audience decided to give Kostić and Macedonian Kristijan Jovanov a second chance.
[9] Sky Wikluh, popular Serbian composer and rap musician, wrote a song for her, named "Moja noć", with production done by Gru.
[2] On 1 July 2009 Kostić performed "Bože pravde", the anthem of Serbia, alongside two more singers at the opening ceremony of 2009 Summer Universiade, which was held in Belgrade.
[2][11] She also performed "Bože pravde" at the closing ceremony of the 2009 Summer Universiade, and at the public reception of Serbian champions from the 2009 World Aquatics Championships.
[3] Kostić is currently working on her debut album, which will be produced by Sky Wikluh, and will include collaborations with several eminent musicians worldwide, such as Greek pop star Anna Vissi.