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Seven South Korean pop groups have split up in the last 12 months -- two since the beginning of 2017 -- raising questions about the future of the manufactured and wildly popular music genre, which has taken Asia by storm.
Mega group Wonder Girls released their final single last Friday. The decade-old group was the first K-pop act to enter the US Billboard Hot 100 with their hit "Nobody" in 2009.
Industry figures point to 2017 as a "pivotal" and "transitional," year for K-pop, with some wondering about the genre's future. Fans on Twitter, from as far as St. Louis, Missouri, to the Philippines, were lamenting about an "era ending."
"It's pretty sad to see these groups disband," said Paul Han, co-founder of allkpop, a site for K-pop gossip and news, which has 10 million monthly readers worldwide.
"You could see that their popularity has waned from their peak and naturally they receive less promotions and eventually disband."
K-pop emerged in South Korea in the early 1990s, and labels such as JYP, DSP and YG built the nation's pop industry from the ground up, creating a training scheme that churned out stars for music, soap operas and movies.
"K-pop really garnered an external following outside of Asia," said Tamar Herman, who covers K-pop for Billboard.com.
The recent splits come down to a number of reasons.
K-pop music contracts usually last seven years, said Herman, and with many of the biggest acts starting out in 2009 and 2010, it means more groups could disband soon.
Still, it's fair to say that many K-pop acts have outlasted or at least matched the lifespan of many Western pop groups -- the Spice Girls lasted four years, Destiny's Child at nine, *NSYNC seven and One Direction at six.
Scandals
K-pop's success has also been dependent on a highly-polished image. Stars typically can't be seen dating, getting plastic surgery, or become embroiled in any kind of scandal, said Herman.
Record labels DSP (Kara and Rainbow) and JYP (Wonder Girls) declined to comment to CNN, except for confirming that the groups were disbanding. The JYP press team did add that the Wonder Girls disbandment was a "sensitive issue."
Girls vs boys
Most of the groups that have split up have been girl groups, because boy bands may be "better investments," said Jeff Benjamin, Fuse TV Senior Editor, who covers the genre.
"On average, album sales for boy bands majorly surpass girl groups and boys go on way more tours in Asia."
"In the end, it feels like there is ultimately a shorter investment window with girl groups—who do tend to sell more singles than boy bands, but that doesn't help the bottom line as much as album sales and tours would—and it seems like those factors would make a group quicker to throw in the towel."
Some groups are conceived as having limited shelf life.
I.O.I, was created as a part of a reality show in 2016, creating a super group of 11 from different entertainment companies. I.O.I was supposed to disband after a year of promotions and ended this past January. "It's despairing, but you see a bit of that discard the old and in with the 'hot and new' that you can see in various other industries," said Han.
K-pop's future
Arenas, like the Staples Center and Prudential Center, are still selling out K-pop concerts. Artists are also doing more collaborations across South Korea and the US.
And, traffic for the allkpop site has been increasing, with more users in the US than any other country, Han said.
"I have to admit, I was nervous when I saw groups like Big Bang, Girls' Generation, 2NE1, Wonder Girls — leaders of a generation of K-pop — not as active as they once were and wondered about the scene's future, especially with international fans," said Benjamin.
"New groups are gaining international fan bases way quicker than their predecessors had, likely thanks to social media, YouTube, and the fact that these fans are already a part of the K-pop scene, and that is very promising."