Rihanna has dropped Chris Brown from her Twitter list after Brown posted a link to one of his songs that appears to have lyrics referencing her - in a nasty way.

Rihanna and Brown have a lengthy history, and most recently the two collaborated on the song Birthday Cake. However, it appears Brown has crossed the line - again.

In the song he tweeted, a remix of Kanye West's Theraflu, he raps "Don't f--k with my old bitches ... like a bad fur ... every industry n--ga done had her.

"Trick or treat like a pumpkin ... just to smash her." 

Almost immediately after the song was posted, Rihanna unfollowed Brown - and he did the same to her soon after. Thus, the rumors of the verses being like her have only grown.

Slideshow: Rihanna Lets It All Hang Out