Rihanna pulled out of her performance at the last minute on On Monday night.
But new reports suggest the star lied about her illness after being disappointed with the way her rehearsal went for the glitzy event.
According to TMZ, sources present at the show heard her "screaming and hysterical" before pulling out.
Whoops!!, these stars should remember they got a lot of fans around the world watching and should always think twice before making crazy decisions