The Sports Illustrated star has taken to Twitter to set the record straight, reported Daily Mirror.
"I love and am proud of my body. Unfortunately, what was said about my body is completely made up to try and drum up controversy where there is none.
"Like every woman, I have moments of insecurity, but I love and am proud of my body - every part of it - and wouldn't change a thing," she tweeted.
The 21-year-old 'Other Woman' star had said in an interview that she wanted a breast reduction,
Upton is currently busy promoting her new film with co-star Cameron Diaz.