On the 12th anniversary of Wonder Girls' debut, HyunA and Yenny reunited (not that they were ever estranged), as revealed on Instagram. https://www.instagram.com/p/BtsxVRvh30X/ https://www.instagram.com/p/BtszaQWjnzw/ They ended up casually doing choreography set to Taylor Swift's "Look What You Made Me Do". https://www.instagram.com/p/Bt0ZJ2MBpdD/ Collab when?