Photo by Perrier-Jouët: Getty Images Young Thug is kicking off 2019 with a splash. The freshly signed Cash Money rapper announced the big news on Instagram just hours ago that he will be coming out with a new single sometime this week.   View this post on Instagram   New single this week?? 🏄🏽‍♂️🏄🏽‍♀️🏄🏽‍♂️🏄🏽‍♀️ A post…