This girl has lost her damn mind! Somebody please get her some help ASAP! Wow!!!!! Eonline Reports Amanda Bynes unleashed some serious fury on Rihanna via Twitter today, calling the singer “ugly” and hitting her below the belt with a reference to her infamous abuse scandal with Chris Brown. All for no apparent reason. “@rihanna Chris Brown beat you because you’re not pretty enough,” Bynes tweeted, going on to say, “@rihanna no one wants to be your lover so you call everyone and their mother that I almost named my new dog Rihanna.” Chris Brown and Rihanna Break-Up  Bynes quickly deleted her tweets…but it looked like Rihanna had already caught wind of theEasy A actress’s insults when she…