In the campaign, the 18 year-old star is dancing with a group of friends. The Gap decided to edit a few images, replacing Stone’s behind.
According to The Sun online Stone said: "All those bum shots? They’re not mine. They’re other girls. That’s not my bum, I promise."
The star is finding humour in the situation. She added: "Apparently, I need a J-Lo bum or something. Bring in the implants, girls."
The new ads will be released in the fall. Stone joins many other famous stars who have worked with The Gap, including Madonna, Missy Elliot, Lenny Kravitz and Sarah Jessica Parker.