Yoona, Taeyeon and Hyoyeon of Girls’ Generation showed off their solid friendship through selfies.

(Yoona's Instagram)

Yoona took to Instagram Tuesday to share group photos that featured three girls smiling brightly at the camera.

The photos were taken during a workshop held by the group’s label S.M. Entertainment on Jeju Island, where its artists, including the girls, attended with other staff starting from Monday.

In the photos, the girls were all wearing pink T-shirts and holding pink stick balloons, all of which were given out by the agency for the event.

In celebration of Girls’ Generation’s 10th anniversary this year, the group is planning the release of a commemorative album and a fan meeting in August, according to its agency.

By Hong Dam-young (lotus@heraldcorp.com)