Alicia Keys keeps it tight on stage. Photo: Jason Kempin, Getty Images

Alicia Keys has a gorgeous, healthy body. But that doesn't mean the petite star can't get a boost from shapewear just like everyone else.

During a show at Madison Square Garden in New York City on March 17, 2010, Keys hit the stage in some shiny black skinny pants and a tank. No big deal right? Well, we thought you might like to know about that tank top -- turns out it's secretly shapewear!

Yummie Tummie, an Oprah favorite, makes popular cotton tanks that have a special midsection made of stretchy suck-it-in fabric.

You can wear them on their own like Keys and no one will be the wiser. Or, layer them under other tops for a slimming foundation.

Since so many fans have taken to wearing the tanks on their own, the brand's creator, Heather Thomson, decided to expand her ready-to-wear items into a collection of work-ready ruffled tops, nightclub-ready corsets, and even turtlenecks and collared shirts -- all with the same secret tummy-slimming layer.

Look for the new line this June at fine department stores like Nordstrom and Bloomingdales, or on

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