Redditvision Song Contest 50

Redditvision Song Contest 50 was the fiftieth ordinary and fifty-fourth overall edition of the Redditvision Song Contest. It was hosted by u/BFerdinand_ in St. Helier, Jersey after their win in the previous edition, with the song "The King" by Sarah Kinsley.

Rest of the World Voting
ROTW was introduced in edition 47, trialing a scaling system for the grand final. The vote-scaling element was removed in this edition, meaning that all users would account for 13% of the final scores, assuming every user on the waiting list sends in their votes, along with all participants voting internally.

Country claim announcement
Edition 50 onwards, hosts will be obliged to public announce a timeframe, within which they will post the sign-ups for the edition.

"A new system of announcing in advance a timeframe for when the sign-ups are happening will be implemented starting next edition. In the past, those were posted at the discretion of the host without any notice for the members of the contest. It will be compulsory for the host to announce on Reddit now a timeframe as to when they are happening. This window of time will be of a maximum of four hours but hosts will be allowed to lower it down to their liking."

New territories
For the first time since special edition 3, new territories were added to the existing pool of countries, which could be claimed in an edition. The following countries were added:


 * The five American unincorporated regions of American Samoa, Guam, Northern Mariana Islands, Puerto Rico, and U.S. Virgin Islands;
 * The French overseas territories of New Caledonia, Saint Barthélemy, Saint Pierre and Miquelon, and Wallis and Futuna;
 * The "British" overseas territories of Anguilla, Bermuda, British Virgin Islands, Cayman Islands, Falkland Islands, Gibraltar, Guernsey, Jersey, Isle of Man, Montserrat, Pitcairn Islands, and Turks and Caicos Islands;
 * The Chinese special administrative regions of Macao and Hong Kong;
 * The Finnish autonomous region of Åland;
 * The New Zealander dependent region of Tokelau.

Of these, six (Anguilla, Bermuda, British Virgin Islands, Montserrat, Northern Mariana Islands, and U.S. Virgin Islands) were left undebuted.

Name
Loona's English name is derived from the Hangul letters ㅇㄷㅇㅅㄴ, each an initial consonant in the syllabic blocks that make 이달의 소녀 (Idarui Sonyeo). When rearranged to ㄴㅇㅇㄷㅅ, it resembles LOONA in the Latin alphabet.

2016–2018: Pre-debut sub-units and Mix Nine
On October 2, 2016, Blockberry Creative announced through Naver that they would be debuting their first girl group through an 18-month-long pre-debut project. Jaden Jeong served as the group's creative director until August 2019, when he parted ways because of creative differences with the company. Between October 2016 and January 2017, four members (HeeJin, HyunJin, HaSeul, and YeoJin) were revealed; each member released a single album typically consisting of a solo track and another track performed with other revealed members, under the group's Korean name Idarui Sonyeo (Korean: 이달의 소녀; lit. Girl of the Month). In March 2017, the group's first sub-unit, Loona 1/3, was introduced, consisting of previously revealed members HeeJin, HyunJin, HaSeul, and a new member, ViVi. Loona 1/3 released the extended play Love & Live and an accompanying single of the same name on March 13, 2017, with a television promotion on SBS's Inkigayo. On April 27, they released a repackaged edition of the extended play, titled Love & Evil, accompanied by the single "Sonatine". Love & Live and its reissued edition reached number 10 and 24, respectively, on South Korea's Gaon Album Chart.

Between April 2017 and July 2017, members ViVi, Kim Lip, JinSoul, and Choerry released their single albums, continuing the same Girl of the Month pattern. In September 2017, three members, HeeJin, HyunJin, and HaSeul, auditioned for JTBC's reality show Gorgonzola; HeeJin and HyunJin passed the audition stage making it onto the show, where HyunJin placed Top 18 and HeeJin placed fourth in the finale. The group's second sub-unit, Loona Odd Eye Circle, consisting of JinSoul, Kim Lip, and Choerry, released the extended play Mix & Match and its single "Girl Front" on September 21, 2017 and began promotions on Mnet's M Countdown. The English version of their song "Loonatic" was released on October 23. On October 31, they released a repackaged edition of the extended play, titled Mix & Match, with three new songs including the single "Sweet Crazy Love". Mix & Match and the repackaged edition peaked at number 16 and 7, respectively, on the Gaon Album Chart.

Between November 2017 and January 2018, they released the solo single albums for new members Yves, Chuu, and Go Won, continuing the monthly pattern along with the digital single "The Carol 2.0" sung by Yves, Vivi, and Choerry. In March 2018, they released the solo single album for the final member, Olivia Hye. On May 30, 2018, the group's third sub-unit, Loona yyxy, made their debut with the extended play Beauty & the Beat. The single "love4eva" featuring Canadian musician Grimes was released the same day with an accompanying music video. The extended play reached number 4 on the Gaon Album Chart.

On August 7, 2018, Loona released a pre-debut digital single titled "Favorite", the group's first song to feature all twelve members, accompanied by a music video focusing on the group's choreography. The pre-debut single was later revealed to be the lead single of Loona's debut EP [+ +].

2018–2019: Official Korean debut with [+ +] and [X X]
On August 20, Loona officially debuted as a full assemble with the release of the extended-play [+ +] (read as plus plus). The album included "Favorite" as the lead single while "Hi High" served as its title track. It debuted at number 2 on South Korea's Gaon Album Chart and was the second best-selling debut album by a girl group in 2018. [+ +] was repackaged as [X X] (read as multiply multiply) on February 19, 2019, with six additional tracks, including a new single, "Butterfly". On August 17, 2019, Loona made their first appearance in the United States, performing at KCON 2019 in Los Angeles. On December 13, 2019, Loona released a single called "365" as an appreciation song for their fans.