God knows what's the issue oof Amanda Bynes with Rihanna. She just attacked Rihanna out of nowhere. you can see her tweets on the picture above. Bynes also quickly deleted the tweets.

Then she posted another one about wanting to name her dog Rihanna. It's unclear what set her off.

Finally, Rihanna had to answer back and she posted and "Ya see what happens when they cancel Intervention?"

Amanda responded (and already deleted): @rihanna unlike ur fugly faced self I don't do drugs! U need the intervention dog! I met ur ugly face in person! U aren't pretty u know it!"

Lets have popcorn and enjoy tweet matches between celebrities !!!