Eight songs ultimately qualified to compete in the final on 24 February 2018 where a public televote and a four-member jury panel selected "Funny Girl" performed by Laura Rizzotto as the winner.

Performing during the show in position 14, "Funny Girl" was not announced among the top 10 entries of the second semi-final and therefore did not qualify to compete in the final.

In early December 2017, the broadcaster announced that they would organise Supernova 2018 in order to select the Latvian entry for the 2018 contest.

LTV broadcast two introductory shows on 25 January and 1 February 2018 that covered the background preparation processes and auditions that occurred prior to the competition.

[8] The jury participated in each show by providing feedback to the competing artists and selecting entries to advance in the competition.

The submitted songs were listed online on the official Supernova website allowing users to either select the "Like" or "Dislike" option for each entry between 18 and 29 October 2017.

[10][11] Auditions in front of the local jury took place on 5 November 2017 at the Alfa Park in Riga and featured the 33 shortlisted entries.

[15] On 20 February 2018, the song "Just Fine" performed by Sudden Lights was announced to have been awarded a second wildcard to qualify to the final.

Commercial Director of Universal Music Group Finland and the Baltics Petri Mannonen was a guest juror for the final.

[21] Laura Rizzotto made several appearances across Europe to specifically promote "Funny Girl" as the Latvian Eurovision entry.

[23] On 21 April, Laura Rizzotto performed during the ESPreParty event which was held at the Sala La Riviera venue in Madrid, Spain and hosted by Soraya Arnelas.

On 29 January 2018, a special allocation draw was held which placed each country into one of the two semi-finals, as well as which half of the show they would perform in.

"[30][31] Laura Rizzotto was joined by four backing vocalists: Antra Kūmiņa, Edgars Zvirbulis, Iluta Alsberga and Kristīne Pastare.

Each nation's jury consisted of five music industry professionals who are citizens of the country they represent, with their names published before the contest to ensure transparency.

This jury judged each entry based on: vocal capacity; the stage performance; the song's composition and originality; and the overall impression by the act.

The individual rankings of each jury member as well as the nation's televoting results were released shortly after the grand final.