Compared to September, there are around same number of kpop girl groups debut or comeback at October.
Blackpink - Lovesick Girls
Blackpink released their first Korean studio album, The Album, with "Lovesick Girls" as the third and main single on October 2, 2020. Leading up to the exclusive video premiere of their music video "Lovesick Girls" just 15 minutes before midnight ET, Blackpink featured in Youtube's new original music show Released as the show's first featured artist, in which included "unfiltered access" moments of the group. The Album peaked at number two on the Billboard 200 and the UK Album Chart, making Blackpink the highest-charting Korean female act on the charts.The album also set a first-week album sales record for a Korean girl group, reaching roughly 590,000 copies sold in just one day after the release date of the physical album. Blackpink became the first-ever million-selling K-pop girl group with The Album, selling approximately 1.2 million copies in less than a month after release.
Blackpink's first documentary, Blackpink: Light Up the Sky, premiered on Netflix on October 14, 2020 and covered the four years since the group's debut in 2016. The documentary included footage from their training days, looks at their home lives, behind-the-scenes stories, and interviews with the members. If you haven't watch, you can find the documentary on Netflix.
On October 21, Blackpink appeared on the American talk shows Good Morning America and Jimmy Kimmel Live! via video chat to promote their debut studio album's third single, "Lovesick Girls", in the United States
Twice - I Can't stop Me
Besides Blackpink, the most well known cameback is Twice for Octorber. Twice released their ninth Korean-language EP More & More in June 2020.The EP was a commercial success in South Korea, selling over 550,000 copies and becoming the group's best-selling album. Following the success of More & More, JYP Entertainment announced that Twice would be releasing their second Korean studio album, Eyes Wide Open in October 2020, to commemorate the group's fifth anniversary. On October 11, the group shared the track-listing of Eyes Wide Open, where "I Can't Stop Me" was revealed to be the album opener.
Hours after the song and the album's release, on October 26, 2020, Twice held a live meeting called "Twice 'I Can't Stop Me' Special Live" on Naver's V app and YouTube, introducing songs from the album and communicating with their fans. To promote the song and Eyes Wide Open, the group appeared and performed on several South Korean music programs, starting with Mnet's M! Countdown on October 29, where they performed "I Can't Stop Me" and "Up No More". They also appeared on KBS2's Music Bank, MBC's Show! Music Core, MBC M's Show Champion, and SBS' Inkigayo, to perform the song. In the second week of promotion, "I Can't Stop Me" won the top spot on Show Champion on November 4.
Behind Blackpink and Twice, it's the competition between YG Entertainment and JYP Entertainment as well.
Weeekly - Zig Zag
The group released their second EP We Can on October 13, featuring the title track "Zig Zag". 'Zig Zag' is a track that talks about the daily life of a teenager and their growth. It is expected that while listening to the track, fans would be able to witness their never ending charm as if they were riding a rollercoaster and they will be making use of the cube as part of their performance.
Weki Meki - Cool
On October 8, 2020, Weki Meki released their fourth EP, New Rules, featuring five songs, including the title track "Cool" and its English version "100 Facts", which is their first song in English
BlackSwan - Tonight
But BlackSwan is not new to the kpop industry, they are Rania before if you follow my blog 2 or 3 years ago. In 2016, the group was renamed BP Rania and remained that way until 2018, when they returned to using Rania. In June of 2020, the group announced they would be rebranding and changing their name to Blackswan.
Loona - Why Not
On October 19, Loona released their third EP titled [12:00] accompanied by the single "Why Not?". [12:00] debuted at number 4 on the Gaon Album Chart, and is Loona's first album to enter the Billboard 200, debuting at number 112
