The images of the new presenter of the Australian version of the reality television show, which show her wearing a floor-length red gown and standing next to co-host Daniel MacPherson, were digitally enhanced.
A Seven spokeswoman told The Daily Telegraph that Mel B's "skin tone was touched up" in the photo.
She also revealed that they "did a bit of work on the neckline of the dress to make it a bit more G-rated", adding that the star's breasts "were quite out-there before".
The spokesperson however denied that Mel B's figure was retouched, saying: "Nothing whatsoever was done to her thighs."
She added that the 36-year-old former Spice Girl did not ask to see the pictures for approval, saying: "As a matter of fact, she was not very demanding about photo approval."
Mel B recently shed 15kg with the help of weight loss company Jenny Craig. She decided to become an ambassador for the brand after gaining a lot of weight before giving birth to daughter Madison seven months ago.
The lineup for this year's Dancing with the Stars includes celebrities such as DJ Vogue Williams, sports star Brendan Fevola, musician Danielle Spencer and former breakfast TV star Kerri-Anne Kennerley.
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