From time to time, it's good to see celebrities getting involved in things that are not meant to bring them more profit or more fame. Of course, saying this and believing it 100% would mean that we would have to look at Beyonce Knowles' latest ad only from an idealistic point of view, assuming that she didn't get paid to do it or that participating in a campaign that aims at helping teens re-discover the good qualities of milk will not make her even more popular.

The bottom line is that Beyonce is again the face of The National Milk Mustache 'got milk?' Campaign. For the new campaign 'Body By Milk', Beyonce brought her sister to pose next to her and to show teens and youngsters all over the US that milk does a booty good. The poster is already out in magazines like 'Cosmo Girl' and 'Teen Vogue'.

The aim of the most recent campaign is to discourage people from drinking sugary sodas, in the hope that they will eventually replace refreshing drinks with at least three glasses of lowfat or no-fat milk. Also, the wider purpose of the campaign is to encourage a healthy way of life, that would comprise sports and healthy eating habits, which will lead to a normal weight.

The poster features the multi-platinum singer with her sister Solange (an aspiring artist), both wearing the now trademark mustaches. The ad also reads: 'Take it from my sister and me, when you look and feel your best, it shows. Some studies suggest teens who choose milk tend to be leaner, plus the protein helps build muscle. Staying active, eating right, and drinking 3 glasses a day of lowfat or fat free milk instead of soda helps you look your best. Talk about working it.'

Other celebrities that agreed to wear the milk mustache for the sake of teenagers are Vince Carter, David Beckham and Sascha Baron Cohen. This is the second time that Beyonce posed for 'Got Milk?', the first time being with her mother, Tina Knowles.