Amanda Bynes will not shut up on Twitter, Bass is next 'Twar'

The nicest former boy bander ever, Lance Bass, learned the hard way no good deed goes unpunished.

Amanda Bynes, the not such a thrilla in Vanilla, launched on him after he offered a buck up on a radio interview.

"You're an ugly ex boy band member" Tweeted Bynes.

TMZ reported that Bass was on Las Vegas' Mark & Mercedes 94.1 radio show on Wednesday to offer his support and advice to Bynes, and instead ignited a "Twar" (Twitter war).

"It's one of those situations where obviously there's some mental problems there and she's not able to see that," Bass, 34, said of the 27-year-old actress. "We all are [able to see it]," he told the radio show.

He added, "I'm actually really scared for her, and I hope someone is able to get to her to give her the help she needs."

Bynes Tweeted in response: "I ignored Lance Bass on Twitter and now he is saying I have a mental illness. Sorry you're an ugly ex boy band member w/ no talent or career."

Bass then replied via Twitter: "Ouch- The Amanda I know would never had said something like this to me- either this is a fake person or she really does have a mental illness. Way too sad. I reached out- all i can do."

The insufferable back and forth kept on, like Brandi Glanville and LeAnn Rimes incessant sniping, as Bynes said: "I haven't spoken to Lance Bass in 11 years. To say I have a mental illness out of nowhere makes me lash out! You're making me crazy!"

Bass was like, oh no, no, no girlfriend: "Now I really don't think this is Amanda- we shot LoveWrecked together 7 years ago and she was just at my bday party 3 years ago. Hmmm 11?"