Deekay wrote for what South Korean girl group formed by S.M. Entertainment?
Deekay:  Deekay have written and produced for artists like Jason Derulo, Jordin Sparks, Lil Wayne, Diddy, Sugababes, Orianthi, JLS, Tinie Tempah, Charice, Allison Iraheta, Method Man, Fat Joe, Styles P, Lemar, Medina, Girls' Generation, Red Velvet, LOOΠΔ, EXO and others.
i don't know