There isn't much information yet on what #catchGG is yet, but it seems like once you start tagging your posts through #catchGG, there will be something special. Jessica explains that it's a sign to connect the girls to their fans, and Tiffany invites fans to 'catch' the girls through the hashtag.

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It looks like it might have something to do with the girls' Japanese promotions. Nonetheless, check out the cute video above!