This has got to be one of the juiciest pieces of gossip we've ever heard -- and no, it's not about someone getting pregnant by her best friends husband, or another starlet on her way to rehab. This is about a common barista at Starbucks trying to do something for the greater good.

In New York's West Village, there's a Starbucks frequently visited by the Olsen twins. In fact, Mary Kate even said, "I always get creamed for having my Starbucks cup. But the only time people get photos of me is when I'm getting coffee, when I can't sneak away from the camera."

So, one barista at the aforementioned Starbucks got sick of seeing the Olsen twins' toothpick legs walk in and out of his shop time and time again and decided to do something about it. The ladies normally order grande nonfat lattes, but, the evil schemester began replacing skim milk with *gasp* regular milk in order to fatten them up.

A source close to the Olsens says she kind of sympathizes but blames the girls' ignorant taste buds for not knowing the difference, "It's also my worst nightmare - that and getting a huge diet fountain soda that is mistakenly regular Coke - but I can def(initely) taste the difference, so it's their own fault if they fell victim."