On 13 September 2018, it was announced that Bojana Radovanović would represent the country in Minsk, Belarus with the song "Svet".[4]
At Junior Eurovision
During the opening ceremony and the running order draw which both took place on 19 November 2018, Serbia was drawn to perform tenth on 25 November 2018, following Ireland and preceding Italy.
Voting
The same voting system that was introduced in the 2017 edition was used, where the results were determined by 50% online voting and 50% jury voting. Every country had a national jury that consisted of three music industry professionals and two children aged between 10 and 15 who were citizens of the country they represented. The rankings of those jurors were combined to make an overall top ten.[5]
The online voting consisted of two phases. The first phase of the online voting began on 23 November 2018 when a recap of all the rehearsal performances was shown on the contest's website Junioreurovision.tv before the viewers could vote. After this, voters also had the option to watch longer one-minute clips from each participant's rehearsal. This first round of voting ended on 25 November at 15:59 CET. The second phase of the online voting took place during the live show and began right after the last performance and was open for 15 minutes. International viewers were able vote for a minimum of three and a maximum of five songs.[6] They were also able to vote for their own country's song. These votes were then turned into points which were determined by the percentage of votes received. For example, if a song received 10% of the votes, it received 10% of the available points.