Terius “The-Dream” Gesteelde-Diamant has been accused of sexual assault, physical abuse and manipulating a former mentee in a new lawsuit. On Tuesday, June 4, Chanaaz Mangroe named both the songwriter and Epic Records in her bombshell legal filing in which she alleged The-Dream promised her if she worked with him, he would “make her the next Beyoncé and Rihanna.” The 46-year-old famously collaborated with a number of famous artists and helped pen hits such as “Single Ladies” and “Umbrella.” However, Mangroe claimed that after she entered in a mentorship with the music producer, it quickly beca…