UPDATE: AnnaLynne just responded to reaction to her nude photo mishap, telling Global Grind "My only response to all these lovely people is, 'He who be without sin cast the first stone.' If you have never messed up or done anything wrong in your life, then please, feel free to judge me."
AnnaLynne McCord shows off her fit body all the time in skimpy bikinis -- but recently showed her Twitter fans a whole lot more!
We're not sure why, but last week the "90210" star tweeted a topless photo of herself to a fan.
"This is for you @meganraee," she said with the pic, adding "You rock! Xxx."
McCord's nipple was exposed in the photo -- and it seems AnnaLynne was quick to make sure she removed it.
"Yes its gone!" the fan tweeted at her after AnnaLynne sent her a direct message. "I wasn't Sure if you noticed it when you posted ... that's definitely a great picture!"
McCord re-posted the photo ... this time with her nipple cropped out.
Check out more photos of AnnaLynne being intentionally sexy in the gallery above.