Amanda Trash Rihanna on Twitter

Amanda Bynes is having a rough week, between her arrest, some bong-throwing, and accusations of being sexually harassed by the NYPD. But that's no reason to take it all out on Rihanna.

Bynes trash Rihanna on twitter, then quickly deleted it but thanks too TMZ the tweets is still alive...see tweets after cut ...

Rihanna reply back to cover up the sh*t tweet but Amanda then shut her down with another tweet..