SPOP Sing! (season 1)

The auditions were announced on 17 May 2018, along with a list of the 200 shortlisted mandopop/xinyao songs published on the Toggle website, which participants are required to sing one of the 200 songs during the audition. Auditions were held at nine different locations, which were either open to public (Open auditions) or held privately (Campus auditions). Similar to Campus SuperStar, auditions were open to students studying on a local institution with an age limit between 13 and 25 years old, and in a change to the former, Polytechnic and University students were also eligible to participate as well. Lee Teng did not appear after the Cineleisure open auditions onwards.[10]

The auditions required singers to enter an egg-shaped karaoke booth to perform a song of their choice. Their performance was recorded under video surveillance, which would be reviewed by the panel of judges after the auditions.[21]

Several short videos of audition highlights were uploaded on Toggle starting on 7 June 2018. Another short episode, Fun With SPOP Sing! was broadcast on Mediacorp Channel 8 on 5 June 2018 at 9.50pm, right after the finale of Babies On Board.[22] A Toggle-exclusive six-episode spin-off of the show, All About SPOP, premiered on 27 July, featuring celebrities and composers sharing their knowledge on Mandopop/xinyao music genre.[23]

The Committee to Promote Chinese Language Learning (CPCLL), a committee which promote Mandarin Chinese to Singapore, was the supporting partner of the show. Ambassador Hartono was among the ambassadors of CPCLL since 2017.[24][25] Other sponsors include Bonia, Huawei, KFC, Mitsubishi Electric, Win2 Crackers and Simmons.

On 16 July, the judges have confirmed and the Top 20 contestants who would advance to the live shows were announced. The identities of the top 20 were revealed to public for the first time in a meet-and-greet session on 21 July at Cathay Cineleisure Orchard.[26][27] The broadcast is streamed live on Channel 8's Facebook page.[28]

The Top 20 contestants appeared at Shine Festival at OCBC Square on 4 August,[29] where they sang "无底洞", "幸福不难", "王妃" and "不为谁而作的歌" in groups.

Three non-competition episodes were aired during the season. A half-hour episode titled Prelude (SPOP 乐飞扬) was broadcast on 9 August on Mediacorp Channel 8 and Channel U after the 2018 National Day Parade, and re-ran on 19 August after the 2018 National Day Rally. It featured interviews from singers, songwriters and producers in Singapore's music industry, as well as the competition's ambassadors, and provides a brief introduction to each of the 20 contestants. The music video for its theme song, "听我唱响", as well as the show's new title card, premiered during this episode.

Two more were aired before the semi-final and grand finals on 28 October and 3 November, respectively. A half-hour episode aired before the semi-final, titled The Final 10 (十强SING人), featured the ten contestants on their preparation leading up to the semi-finals.[30] A two-hour special aired the day before the grand finals, which features a compilation of performances, was titled Non-Stop Music (歌曲马拉松). Unlike the regular episodes, Non-Stop Music was not available for catch-up.

A SPOP Sing! promotional pop-up store appeared on Bugis Junction on 29 and 30 September 2018 in promotion of the show. Hosts Lee Teng and Gao Meigui appeared on the 29th, and YES 933 DJs Henry Law and Hazelle Teo appeared on the 30th.[31]

A second pop-up store was held on orchardgateway on 27 October and the semi-finalists appeared in a meet-and-greet session. The semi-finalists also appeared in Ngee Ann Plaza for guest performances in the Mediacorp Subaru Car Challenge.[32]

A non-telecast pre-show music showcase was held at the Padang on 4 November at 4.00pm and featured local musicians Derrick Hoh and Trouze, Kelvin Tan, Desmond Ng, AL4HA, Kelly Poon, StellaVee (Stella Seah and Vee), The Apex Project, and Elton Lee.[33]

• air-date: 21 September 2018 (Toggle);[35] 24 September 2018 (Mediacorp Channel 8)

For the first four quarter-finals (复赛), five contestants compete each week to vie for a place in the semi-final (半决赛). Prerecorded performances of each contestant's performance aired, as did the judges' selection (五选二) of two contestants from each group to advance to the semi-final. The remaining three contestants who were not chosen by the judges were placed under the "elimination zone" (淘汰区) and were in risk of elimination. After the judges' decided on the first two contestants, the open field audience will then cast their votes via their remote device to save one contestant from the "elimination zone" (SPOP抢救SING人) and that contestant had to compete again in the wildcard round (翻身赛). A new competition element, "popular index" (人气指数), was introduced, which is the open field audience's evaluation for a contestant's performance, though this does not necessarily influence the outcome of the competition, as the judges themselves select which contestants were to advance and which contestants were to eliminate.

For all episodes, Billy Koh and Peter Lee were the first two judges, while the third judge was rotated in each quarter-final, with singer Joi Chua taking on the first and third quarter-finals, and Jimmy Ye on the second and fourth quarter-finals; both singers joined as judges on the wildcard round.

• air-date: 28 September 2018 (Toggle);[36] 1 October 2018 (Mediacorp Channel 8)

• air-date: 5 October 2018 (Toggle);[37] 8 October 2018 (Mediacorp Channel 8)

• air-date: 12 October 2018 (Toggle);[38] 15 October 2018 (Mediacorp Channel 8)

At the end of the fourth quarter finals, it was announced that all judges agreed to bring back one further act whom they felt should not have been eliminated on the quarter-finals; the singer was later revealed to be Karena Yeo.

• air-date: 19 October 2018 (Toggle);[39] 22 October 2018 (Mediacorp Channel 8)

The five contestants who were recipients of the "audience's save" and "judge's save" from the first four weeks returned to the stage to perform for the wildcard round (dubbed as "Comeback round" in the captions). Like the previous quarter-finals, judges decide which two contestants advanced to the semi-finals. The "popular index" was discontinued from this round onward and was replaced with a scoring system, in which the top two scoring contestants advancing to the semi-finals, while the other three contestants were eliminated.

• air-date: 25 October 2018 (Toggle);[40] 28 October 2018 (Mediacorp Channel 8)

Ten contestants performed two songs in this semi-final, one with a group (The judge's top three acts, Marcus Tay, Daryl-Ann Jansen, and Jarrell Ng, did a schoolyard-style pick to assign two/three more contestants to form their group) and another with a solo (ten of 11 songs were assigned by production and contestant picked the song by racing first to "snatch" their Huawei smartphones; "她说" was the only song unselected).

After each performance, two different set of scores were shown; one after the group's/every two solo performance (which is a given score from one of the three judges), and another after all the contestants have performed (average of all the judges' scores), with the latter accounted to the overall score. After the first round scores are revealed, each judge then picked one contestant from each group to receive a bonus score for their individual performance as a group (indicated in an orange background). The first round has a 30% weightage towards the overall score (all the members for the group received identical set of scores), and the second round covered the remaining 70%. Only the scores for the top five contestants were revealed (with their contestant's smartphone displaying the show's logo); contestants with the three highest combined scores will directly advance to the grand finals, while the two remaining contestants will compete for the fourth and final finalist via the "audience's save".

Mediacorp host (who was also the host of another S-pop themed competition SPOP Hurray!) Quan Yi Fong was officially introduced as the fourth host of SPOP Sing!, and Joi Chua served as the episode's third judge. Before the start of the second round, group performances (see non-competition performances below) were made to pay tribute to the late-xinyao singer Dawn Gan, who died on 22 September 2018.[41][42]

• air-date: 4 November 2018

Four finalists performed up to four songs in the live finale. Liang Wern Fook and Eric Moo were brought in as guest judges for the grand finals at the Padang (dubbed as "决战@Padang").[43] Unlike regular episodes, the grand final does not have captions (including the re-run), as it was a live broadcast.

Eliminations occur at the end of each round starting from round two, in which one contestant who received the lowest judge's score (scores are separate from each round) was eliminated. In round one, the contestant with the highest judge's score was exempt from performing (and immune from elimination in) round two. During the fourth and final round, online votes cast from the public (a 20-minute voting window which opened from 9.05pm) decide on which contestant will win SPOP Sing!.[44]