The singer spiced up Las Vegas when she posed in some of the sexy underwear, revealing the new designs - as well as her own curves - ahead of the launch of the new collection.
The brand was worn by Julia Roberts during her Oscar-winning performance in Erin Brockovich and has gone on to become a multimillion-pound business.
In the new campaign, Mel B, who was nicknamed Scary during her time with the Spice Girls, aimed to capture the glamour of Las Vegas showgirls.
Mel, 34, has also revealed that she had a scary moment recently when she flew back to the UK minus her underwear.
But luckily, as face and body of Ultimo, the former singer was able to stock up on the new range.