Taeyeon proudly showed off her abs in her individual teaser photo for the upcoming Girls' Generation title track "You Think," but it also drew concern from fans that feel the singer is getting too thin.

On August 17, the Girls' Generation leader slipped on a bejeweled top, which revealed her abs as well as slim arms, and paired it with belted black pants.

Some fans complimented Taeyeon after seeing the teaser: "Whoa abs from soft tummy," "You are beautiful and cute," "Gorgeous! Like always! Taetae keep strong."

But others encouraged her to put some more pounds on her thin frame: "You look so thin unnie! Eat lots of food and do more exercise pls," "Babe, please eat more. I'm so worried about u."

Taeyeon's midriff-revealing photo is part of the teaser promotions that Girls' Generation members are putting out on their social media accounts ahead of their new album launch.

Girls' Generation plan to officially launch their fifth album in halves, six songs each on August 18 and 19, with "You Think" releasing on the latter day. Based on previews, "You Think" is a hard-hitting dance track and its music video.

The girl group spent last month promoting the pre-release track "Party" and are now in the second phase of their summer comeback. 

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Mickey is a writer and digital content creator based in Manila. He is a co-founder of ZAVI App and editor of the small business blog IndieMickey. He has also been bitten by the K-pop fashion bug - follow him on Instagram @mickjami.