This “Baywatch” babe is fighting back. 

Donna D’Errico is hitting back at plastic surgery critics on Instagram with a lengthy caption accompanying a picture of her thong-clad bottom about what work she’s had done – and what she hasn’t.

The actress, 55, revealed that she gained weight while depressed after her mother died, but later got her “ass to the gym” and dropped 40 pounds through diet and exercise.

However, she said, “the weight loss left some loose skin I didn’t like so I went in and got that buttoned up and have no shame in admitting that. It made me feel better and more confident.”

She continued, “People love to say I owe my body to plastic surgery. If saying that and believing that makes them feel better about themselves, go for it.”

She ended the rant referencing the sexy photo she posted, writing, “So this is me. All of me. From every angle. No I’m not perfect. But perfect is impossible and boring.

I hope you enjoy the pictures as much as I am enjoying freeing myself from fear of judgement by posting them. And if you don’t that’s ok too.”

However, fans were loving the butt-baring pic, as per usual.

In the comments section, fans applauded her honesty – and her derriere. “That Tush!!” one supporter exclaimed. 

Another encouraged her by writing, “Ya know Gal you gotta feel good about YOURSELF before anyone else can feel good about you. YOU have to think that you are beautiful and sexy before anyone else can. Looking good is hard work and commitment! Oh…… and you’re doing a GREAT job!”

Another called her post, “So amazing, in so many ways!”

For more Page Six Style …

The OnlyFans creator often shares sizzling Instagram photos in barely-there swimwear and has confronted trolls in the past for their commentary. 

After people left nasty comments on her July Fourth photos last year she told cyberbullies, “Let me tell you something that might surprise you. I can actually wear and do literally whatever I want.”

Clearly she’s taking her own advice.