It was recently announced that DIA and MOMOLAND will be adding two new members, each, to their respective groups, bringing their member totals to nine. While some loyal fans might be surprised about the lineup changes, there’s really no cause for concern; countless idol girl groups have added members in the past and gone on to become successful. Here are seven groups that succeeded after fresh faces were added to the mix:
1. Girl’s Day
Most people have forgotten this, but Girl’s Day originally debuted as a five-member group without Yura and Hyeri. The pair replaced Jisun and Jiin, who left after Girl’s Day’s debut single “Tilt My Head” was released. Girl’s Day’s first single with Yura and Hyeri, “Nothing Lasts Forever,” received a positive reception from fans and the public, and then the group scored their first big hit with “Twinkle Twinkle.” They went on to become even more popular when the group released chart toppers like “Expectation” and “Something.”
KARA first debuted in 2007 as a four-member group with a strong girl crush image. Member Sunghee decided to leave to pursue her education after the group’s first single was released, so DSP Media rebranded KARA by changing the group to a cute concept and adding members Goo Hara and Kang Jiyoung. KARA went on to become one of the best-selling K-pop acts in both Korea and Japan. They later had another change when Heo Youngji joined in 2014. Together, the final lineup released the hits “Cupid” and “Mamma Mia” before going on hiatus.
Red Velvet have been popular since their first single “Happiness,” but they really took off a year later when maknae Yeri joined. With Yeri on board, Red Velvet scored huge hits like “Ice Cream Cake” and “Dumb Dumb,” and even won their first music program award.
EXID were a six-member group when they debuted in 2012 with the hit “Whoz That Girl.” Then Yuji, Dami, and Haeryung left (they went on to form their own group together, BESTie), and were replaced by vocalists Solji and Hyelin. After a few singles, EXID finally hit the big time with “Up & Down” and went on to become one of K-Pop’s biggest girl groups.
The confident STELLAR are known for their mature concept, but they originally debuted with a cute image. Following the release of their first single “Rocket Girl,” members Leeseul and JoA left to pursue other opportunities and were replaced by Minhee and Hyoeun. STELLAR hit it big with “Marionette.”
Wonder Girls have had some of the most notable lineup changes. Their debut lineup included HyunA, who left due to health reasons right before the group released their iconic hit “Tell Me.” Hyelim later joined to replace Sunmi, and was a part of Wonder Girls classics like “2 Different Tears” and “Be My Baby.” The group’s biggest change came later when Sunmi returned and Sohee and Sunye left, ushering in a new look Wonder Girls who re-branded themselves as a band. The band concept was also hugely popular, spawning the hits “I Feel You” and “Why So Lonely.”
Nine Muses have had a lot of lineup changes and they're very popular. The group’s first breakout hit was 2012’s “News,” which marked the arrival of new member Kyungri. The following year, after adding Sungah, they scored their first top twenty single with “Dolls.” In 2015, another lineup change resulted in Nine Muses’ highest-charting song to date “Drama,” which marked the arrival of Keumjo and Sojin.
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