"Bad Gal" Rihanna wasn't about to let a fan talk smack about her on Instagram, and struck back after someone asked about a "bump" on her lip. Taking offense after @n_c_l asked "What's that big ass bump on her lip, top right side???," Rihanna replied "its a SCAR!!! Any other questions!! Ignorant ass chicken head b*tches!!" 

Many are saying that the scar is from Chris Brown beating her four years ago, but Rih didn't feel the need to open up about how she got the scar. Check out the photo in the above slide: 

Source: Instagram