Rowland can now be seen on buses across Britain sporting the famous milk tash.
Carrying the headline "feel good factor", the advertisements, shot by photographer Perou, promote the health benefits of drinking low fat milk.
The campaign is designed to remind people that milk, packed full of nutrients and containing less than 2% fat, is the ideal product to keep you feeling good.
Rowland, who shot to stardom in Britain after joining the X Factor panel in August, said: "I really believe that looking after your body makes you feel good on the inside and happy on the outside.
"When I'm feeling fit, I also feel confident and comfortable in my own skin.
"I like to eat healthily and milk is an important part of that; I have muesli with semi-skimmed milk when I wake up in the morning and now that I am spending this winter in London, I love to pick up a latte on my way home from the studio when it's cold outside."
The former Destiny's Child performer is the latest in a long line of celebrities to don the famous milk tash following celebrities such as Harry Potter star Rupert Grint, F1 driver Jenson Button, supermodel Elle Macpherson, pop princess Pixie Lott and Michelin-starred chef Gordon Ramsay.
SLIDESHOW: Behind the scenes of Kelly Rowland's milk photoshoot...