In case you haven't been following the curious case of former Disney actress Amanda Bynes, she's out Lindsay Lohan'ing Lindsay Lohan. The troubled former actress took aim at Rihanna via Twitter, saying that Chris Brown beat her because she's not pretty enough.

Bynes, who retired from acting and has since gone nuclear with arrests, apparent substance abuse issues and more wigs than Nicki Minaj, threatens to sue publications via tweets all the time. Bynes tweeted: "@rihanna Chris Brown beat you because you're not pretty enough."

She quickly deleted the post, but nothing dies on the Internet and it lives on here.

Bynes also tweeted disgust at RiRi often referring to people as her "lover," which made Bynes want to name her new dog Rihanna.

No one is sure why Rihanna was Bynes' target, but the onetime actress is a hotly watched and discussed media topic right now, which is why her tweets grab headlines.

Ri saw the tirade and did offer a brilliant reply, which is below.

Bynes, who was arrested for allegedly tossing a bong out of a window after her neighbors supposedly complained about her public pot smoking, then posted another tweet, which she also deleted. She wrote: "@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!"

The two ladies enjoyed a photo opp in 2006 in NYC, which you can see below. That may be meeting that Bynes spewed about. My, how have things have changed for Bynes. RiRi still looks amazeballs, though!

Evan Agostini, Getty Images