2NE1's Dara has been keeping her hair under wraps, possibly for her group's upcoming comeback!Dara updated fans on her Twitter as she wrote, "End of rehearsal!!! ^_^", along with a selca showing Dara keeping her hairstyle covered with a bandana and hat. Minzy also shared on her new Instagram, "Kongstagram kkk..with Dara", and the two members were both spotted covering their hairstyles under hats.Blackjacks commented, "Are you going for